You could also add every other Smash game, since I'm pretty sure they all have some sort of credits mini game. Super Monkey Ball 2 as well. Also, would Super Mario Galaxy 2's credits count? https://youtu.be/IH2p2Xzi-4I?t=378

Rocket: robot on wheels and disney's party

legendary gary (indie game) lets you flick the middle finger up at its ending credits

Bayonetta?

Donkey Kong Country and Kid Icarus Uprising have fake-out credits sequences which counts as a gameplay segment in between parts of the credits, kinda.

The Wonderful 101!

Thank you guys! Also I'll count Kid Icarus for its unique fake-out lol

I think out of all these, both Splatoons still are my favorites for the absolute vibe it has

LittleBigPlanet

Ehrgeiz, where the credits sequence is actually the final boss

it's been something like a lifetime since i played wild arms, but i remember it having at least one credits sequence before the game's actual ending - almost like the ending of an episode (or season/arc) of an anime... i believe it was all in-game cutscenes, though i don't think it was playable. wondering if anyone out there has a fresher memory of this since i'm not finding much via google.

Damn, I played that fairly recently and I can't remember either