"There are eight playable squad members; Mario, Luigi, Peach, Yoshi and Rabbid equivalents of each, and only three to a squad, so what if the player only uses Mario, Luigi and Peach the whole game? It wouldn't be Mario and Rabbids at all then, it would just be Mario murdering Rabbids, and we've been skating on thin ice with the racism thing ever since we gave Mario an outrageous comedy Italian accent. So the game flat out forces you to put at least one Rabbid character in your party. No explanation is offered, the game just greys out all the home-team Mushroom Kingdom lads if you've already got two, so if you want to team Luigi's long-range focus with Peach's short-range superiority, then you can eat feces fettuccine, my friend! This might be the first example of a gameplay mechanic introduced solely for the sake of the contractual obligations of its characters."
January 1, 1970
https://en.wikiquote.org/wiki/Zero_Punctuation