In Mario & Luigi: Brothership, Mario and Luigi communicate mostly by saying each other's names. By the time the first dialogue box appears 5 minutes in, Mario has already said "Luigi" 21 times, and Luigi has already said "Mario" 14 times.

@chuggaaconroy.bsky.social’s let’s play of BiS got me to replay the game, and the train boss is just as bad as I remember. I thought i might’ve just had kid-skill issues but no. Who thought this fight was okay.