Soon after Nils had won his third round match, the third round was over and the matchups for the fourth round were revealed. Nils quickly learned after the revelation that his opponent in the fourth round, which would be in the blue stadium, was Dean.
"This was bound to happen sooner or later," said Dean who was with Nils along with the rest of the rivals, "Let's give it our all."
"Right," said Nils.
That night, Nils and Tana were talking about their final battles before battling in the main stadium along with the visiting Ren, who was staying with Libby and her parents, and Firenze, who got her own room after the wedding so Nils and Tana could be alone.
"So you're going up against Dean now Nils," asked Firenze who remembered from her Gym Battle with Dean how strong he is, "He's a strong trainer." Back when I battled him, His Barbaracle defeated Houndoom and Torkoal while severely weakened Rapidash who was defeated by his Purugly who didn't even get a scratch."
"I hope you know what you're doing Nils," said Ren.
"I hope so too," responded Nils.
Later, Ren and Firenze left for their rooms while Nils and Tana went to bed.
The next day, Tana went to the red stadium for her fourth round match while Nils went to the blue stadium for his match.
When Nils entered the battlefield, he saw Dean who was already there and was ready for battle.
"Go Gardevoir," said Dean and a Gardevoir appeared.
"Go Zebstrika," said Nils and Zebstrika was sent out.
"By decision of coin toss, Nils will have the first attack," said the referee.
"Use Thunderbolt," Zebstrika and Zebstrika used the chosen attack which Gardevoir dodged.
"Calm Mind Gardevoir," said Dean and Gardevoir used the move of choice which raised it's special defense and special attack.
"That's a good move for Gardevoir," said Gunter who was watching the battle.
"I hope it doesn't give Nils too much trouble," said Ren who was also watching along with Libby.
"Use Thunderbolt again," said Nils and Zebstrika used Thunderbolt again which managed to hit Gardevoir this time.
"Moonblast," said Dean and Gardevoir used the decided attack which damaged Zebstrika whose special attack was lowered.
"Wild Charge," said Nils," and Zebstrika used the attack that was selected which gave a lot of damage to Gardevoir but also damaged Zebstrika.
"Use Psychic," said Dean and Gardevoir used the selected move which damaged Zebstrika whose special defense also got lowered.
"Wild Charge again," said Nils and Zebstrika started to use Wild Charge again.
"Use Moonblast when it hits," said Dean and once Gardevoir got hit by Wild Charge, Gardevoir used Moonblast which gave Zebstrika more damage than the last one because of Psychic.
"Thrash," said Nils and Zebstrika used the selected move which knocked out Gardevoir and made Zebstrika confused.
"Gardevoir is unable to battle," said the referee, "Zebstrika wins."
"You were amazing Gardevoir now take a rest," said Dean as he returned Gardevoir. "Go Garchomp," and a Garchomp appeared.
"Return Zebstrika," said Nils as he returned Zebstrika, "Go Machamp," and Machamp was sent out.
"Use Dragon Claw," said Dean and Garchomp started to use the move of choice.
"Use Dynamic Punch," said Nils and Machamp hit Garchomp with the decided attack which stopped Dragon Claw, gave Garchomp lots of damage and confused Garchomp.
"Well since you're confused anyway, use Outrage," said Dean and Garchomp managed to use the chosen move which gave Machamp lots of damage.
"Use Strength," said Nils and Machamp used the selected move which gave some damage to Garchomp.
"Try Dig," said Dean but the confusion prevented Garchomp from using the attack that was decided.
"Use Low Sweep," said Nils and Machamp hit Garchomp with the move of choice which not only damaged Garchomp but lowered Garchomp's speed.
Just then, Garchomp snapped out of the confusion.
"Great Garchomp," said Dean, "Now use Aerial Ace," and Garchomp started to use the attack of choice.
"Use Revenge after it hits," said Nils and once Machamp took super effective damage from Aerial Ace, Machamp used Revenge which knocked out Garchomp.
"Garchomp is unable to battle," said the referee, "Machamp wins."
"You did your best Garchomp now rest up," said Dean as he returned Garchomp, "It's up to you my old friend, go Barbaracle," and the Barbaracle that battled the family of the Kalova was sent out.
"Return Machamp," said Nils as he returned Machamp, "Go Venusaur," and Venusaur was sent out.
"Use Razor Shell," said Dean and Barbaracle used the chosen move which wasn't very effective on Venusaur but did lower Venusaur's defense.
"Petal Blizzard," said Nils and Venusaur started to use the decided attack.
"Skull Bash," said Dean and Barbaracle prepared for Skull Bash which raised its defense and decreased the damage it took from Petal Blizzard.
"Ok then, use Energy Ball," said Nils and Venusaur used the decided move which gave Barbaracle super effective damage and lowered Barbaracle's special defense.
Barbaracle then used Skull Bash which gave Venusaur a lot of damage.
"Use Energy Ball again," said Nils and Venusaur used another Energy Ball only for Barbaracle to dodge it.
"Use Stone Edge," said Dean and Barbaracle used the selected attack which gave Venusaur tons of damage.
"Sludge Bomb," said Nils who realized Venusaur couldn't win and decided to at least weaken Barbaracle and Venusaur used the chosen attack which wasn't that effective and didn't poison Barbaracle.
"Nice try Nils," said Dean, "Use Stone Edge," and Barbaracle used another Stone Edge which knocked out Venusaur.
"Venusaur is unable to battle," said the referee, "Barbaracle wins."
"You did what you could Venusaur now rest up," said Nils as he returned Venusaur, "Go Zebstrika," and Zebstrika was sent back out. "Use Thunderbolt," and Zebstrika used the move of choice which gave Barbaracle extra damage because of Energy Ball.
"Stone Edge," said Dean and Barbaracle used yet another Stone Edge which knocked out Zebstrika who was badly damaged by battling Gardevoir.
"Zebstrika is unable to battle," said the referee, "Barbaracle wins."
"You did well Zebstrika now take a nice rest," said Nils as he returned Zebstrika, "Go Machamp," and Machamp was sent back out.
"So it's come to this," said Dean, "You're Machamp verses my Barbaracle." "This should be interesting."
"You're right about that Dean," said Nils, "Now use Dynamic Punch Machamp," and Machamp used the move of choice which missed because Barbaracle dodged.
"Scald," said Dean and Barbaracle started to use the decided attack.
"Use Revenge," said Nils and Machamp attacked Barbaracle with the selected move after getting damaged and burned by Scald and Barbaracle took tons of damage from Revenge being super effective and boosted by Machamp's ability, Guts.
"Use Razor Shell," said Dean and Barbaracle use Razor Shell which gave some damage to Macham whose defense also got lowered.
"Dynamic Punch," said Nils and Machamp started to use the selected move.
"Skull Bash," said Dean and Barbaracle prepared for Skull Bash but once it got hit by Dynamic Punch, Barbaracle became confused..
"Use Low Sweep," said Nils and Machamp used the decided attack which gave so much damage to Barbaracle who was then unable to use Skull Bash because of the confusion. "Low Sweep once more," and Machamp used another Low Sweep which knocked out Barbaracle.
"Barbaracle is unable to battle," said the referee, "Machamp wins which means Nils wins the match."
"That was one of the best battles that I've had," said Dean after he returned Barbaracle and walked over to Nils.
"It was a good battle for me too Dean," responded Nils.
"Good luck in the main stadium rounds," said Dean to Nils as they shook hands.
Later after all of the fourth round matches were finished, everyone was summoned to the main stadium to learn the matchups for the fifth round which would be the first of the remaining rounds to take place there.
"So only the two of us, Rex, Obelia and Arnold have made it this far," said Tana to Nils.
"Apparently," responded Nils.
Just then, a giant computer on the side of the stadium revealed the matchups for the fifth round and it showed that Rex will battle Obelia, Tana will battle Arnold, and Nils will battle a blonde haired girl that he recognized as the girl he battled at the the Pokemon Center on the hill at Seafoam Island.
"I guess we'll be battling again," said the girl who walked over to Nils and Tana, "I'm Xandra by the way and I was hoping to have a rematch with you."
"Well my name is Nils," introduced Nils, "And you're on.
After the revelation of the matchups, everyone left and they were all wondering what would happen the next day in the tournament.
