Ok, so this one I really liked, so I left it for last. I'm not sure if this is canon anymore, but hey, this is fan fiction. I thought it was cute.
Anakin, Ahsoka, Rex, Fives, Jesse and Echo were in a briefing.
"Alright, we need a way to sneak someone into the separatist base to bypass security and take down the security measures from the control room." Anakin said.
"The problem is, how do we sneak into a separatist base when there isn't anything other then Grievous and a bunch of droids on board." Ahsoka added.
"Which is where we came up with an.. unconventional idea."
"We've been practicing a force trick which manipulates the force in a way to turn something into something else."
"We thought if we could sneak in someone as some kind of rare animal as a tribute to Grievous, they could sneak into the control room that way." Anakin finished.
"So now the only thing is, we need a volunteer."
Everyone turned to Rex. Rex sighed. "Let's get this over with."
10 minutes later, Rex was a Vulptex and Fives had a huge grin on his face. 30 minutes later Rex was in the separatist headquarters and 40 minutes later their mission was over, and Rex was back to normal.
"That worked better then I thought!" Ahsoka exclaimed, the flaming separatist headquarters behind them.
"We should do that more often." Fives said.
"With all do respect, General, I think I would rather be a geonosian's dinner." Rex replied.
Anakin nodded. "That's reasonable."
"I will never understand how the force works." Rex said.