Will make better one in the future, this just shows what characters are best to pick for each stage if there is more than 2 options to pick

Not: it is useful to have P2 pick the character they are good with unless it truly effects the gameplay of the stage like in Battlefield Fortress P1 needs to be Meta Knight

Midair Stadium - P1 Kirby P2 Mario

The Battlefield Fortress - P1 Meta Knight P2 Marth

The Lake Shore - P1 Yoshi P2 Mario (Pit/Kirby also good)

The Cave - P1 Yoshi P2 Mario (Pit/Kirby also good)

The Wilds 1 - P1 Meta Knight P2 Marth

The Wilds 2 - P1 Pit P2 Yoshi

The Swamp - Vs Giant Diddy P1 Falco P2 Fox After P1 Fox P2 Falco or Diddy

Research Facility 2 - P1 ZSS P2 Pika Fight P1 Pika P2 ZSS After Fight P1 Pika P2 Samus

Outside the Ancient Ruins - P1 Captain Falcon P2 DK

Battleship Halberd Interior - P1 Meta Knight P2 (if you stack up damage Lucario, if not Snake) Fight P1 Meta Knight P2 Snake

Battleship Halberd Bridge - P1 Fox P2 Sheik or Snake

Subspace Bomb Factory 2 - P1 Captain Falcon P2 DK Fight P1 Captain Falcon P2 DK Ridley Fight P1 DK P2 Captain Falcon

Subspace 1 - P1 Ness P2 Luigi (Try to have P2 get most of the trophies)

Great Maze P1 Meta Knight P2 Charizard (Yoshi/Falcon/DK/Marth for backup)