A Torracat was wandering the lava plains when he ran into a...rather horny Houndoom. They were both male, but that didn't matter to the Houndoom, who was twice as tall and large as the cat pokemon. The 1.40 meter tall dog had an impressive 1.1 meter cock, a monster compared to the Torracat's 0.5m.
With no mercy, Houndoom thrusted half his cock into Torracat, causing him to moan and scream in pain before it became pleasure as he pushed the rest in, including his knot. He then pulled out to the tip before slamming in at a steady, slow pace.
"More...faster..." moaned Torracat.
Not willing to argue with his mate, Houndoom began to slam into Torracat harder and faster, reaching a faster pace now, shoving his dick and knot into Torracat's tight ass. Torracat came on the floor, but Houndoom was far from cumming yet. And that was fine by Torracat's standards.
"Faster! Harder! Give me your best!" shouted Torracat lustfully.
Houndoom obliged to this and slammed in at extremely fast pace and extremely hard force, pounding Torracat's ass with his 1.1 meter cock. Torracat moaned and shouted in pleasure as he came again on the floor. Houndoom's knot was swelling even more with the prepared cum. He then let out a roar, pounding faster in and out as his cock shot out white, sticky cum into Torracat's asshole. Torracat screamed in pleasure as Houndoom filled him with his cum.
Even once he had finished, he was not completely done. He began pounding once again, already building up the same pace and perhaps even faster. Then, Houndoom began to glow and his dick grew inside Torracat's ass, making him scream in lust and delight as he was stretched to new limits. The expansion just gave more pleasure as he sped up considerably.
Houndoom had mega evolved, his dick now 1.8 meters long, much thicker and much more delightful for Torracat who was still moaning in delight. Torracat came on the floor multiple times as Houndoom sped up to the extreme, slamming his knot and balls in Torracat's hole as his whole cock swelled with his awaiting load. Being faster and stronger in his new form, this gave Torracat much more pleasure.
Houndoom then raised his head to the sky and let out a howl of joy as he began to once again pump white cum into Torracat with the force of a fire hose, filling him to the extreme as he continued to pound his ass all the while to push his cum deeper. Torracat yowled in pleasure as he began to glow white and change form until he grew into a huge Incineroar, pulling away with his ass dripping in cum.
However, now he had evolved, Incineroar had a massive 1.9 meter dick, bigger than even his own height. And he wasn't done. He wanted his turn. Without warning, he grabbed Houndoom with his large paws and slammed his huge dick into his tight ass. Houndoom yowled in pleasure as Incineroar began to mercilessly pound his ass, reaching an extreme pace and force as he pounded Houndoom into oblivion, slamming his furry balls inside the hole and all as his thick cock filled Houndoom's ass.
Houndoom moaned in pleasure, coming on the ground as Incineroar pounded his ass before Incineroar let out a roar, releasing loads of cum into Houndoom's ass and filling him with warm, sticky fluids as he pounded restlessly. Even when he had finished cumming, he kept pounding regardless, causing Houndoom to come again as he gained even more pace. Incineroar did this for ages before he came again, filling Houndoom even more but not letting a drop of cum escape.
He continued this multiple times, pounding faster and harder until it was almost supernatural, filling Houndoom with his cum before, after one final load, pulling out and letting him rest.