Pokémon Mystery Dungeon Explorers/YMMV

Alternate Character Interpretation: While the Wigglytuff from the first games was just a Cloudcuckoolander selling Friend Zones, fans consistently debate on whether or not Guildmaster Wigglytuff's off-kilter, laid back ways are him deliberately concealing how much he really knows or if he's just a Genius Ditz with moments of Crouching Moron, Hidden Badass.
Ensemble Darkhorse: Grovyle.
He's Just Hiding: A fair portion of the fandom's reaction to Grovyle's disappearance near the end of the main arc. What actually happened to him was later revealed in Special Episode 5 of Explorers of Sky.
Magnificent Bastard: Dusknoir and Darkrai certainly qualify.
Useless Useful Spell: Unlike in the main game, Sleep gets nerfed in the post-game, with the advent of IQ skills. Several pokemon are suddenly immune to sleep or recover from status effects quickly. Suddenly, Spore and Sleep Powder seem a lot less useful...