What was with all those un Mario-like Mario games?

Was just watching and ep of Super Mario World. Mario sounds like Danny DeVitto and Luigi is a little bit like Rodney Dangerfield. Peach has a nasal voice. And Yoshi sounds like a little cute talking dino would. It started off with Mario and Peach playing tennis using fireballs as tennisballs. Yoshi was the ballboy and kept eating the fireballs. Then King Koopa and his kids led all the cave people of the village to some circus and I lost interest there. They do use sound effects from the game though.