

I think there’s also a button the active player can press to switch out.
Either A or Select. On DKC 2 and 3, A gets the other monkey on the 1st’s back, so you can throw them at an enemy or on a platform. 2 and 3 also feature a 2 player “competitive” mode, with each player going 1 life or 1 stage
On the SNES, all of the games below have coop: