Bowser and Bowser Junior are the main ones you'll find. Then there's the koopalings.
Goomba
make your friend go to download play, 3DS, and then you guys can play CO-OP
his name is wario
browser
Almost any Mario characters, all the collie yoshis, some more guys
Goomba
the next one will be called the legend of the dry guys also there will be a new super Mario world i don't know the dates yet
New super mario bros 2 is real but thers no dry guy thing.it only comes out on the 3ds.and there's also another called new super mario bros u for the wii u. I reccomend getting both. You can watch e3 trailers online
you have to complete level 2 as mini Mario and jump on the snake guys head when he has 3 levels and clomplete level 5 as mini Mario
make your friend go to download play, 3DS, and then you guys can play CO-OP
Only Mario and Luigi.
Wario.
his name is wario
browser
No, she's good; she's on Mario's side. Mario can only kill bad guys.
I had actually never played Super Mario Bros.: Lost Levels, but, I have to say, Super Mario Bros. 2 is pretty crummy. They replace the goombas with shy guys. There are so many enemies, and so little power ups. If you get a GAME OVER, you have to start all over again. You start with only 3 lives. They replace the bosses with Birdo, and replace bowser with a giant burping frog. At the end of each stage, you have to battle Birdo. It's not multi-player. The Invincibility Stars takes so long to get to you. My last complaint is that when you finish the game, Mario wakes up from a dream. It was all a dream. So, to make a long story short, Super Mario Bros. 2 is a rip-off. P.S. Nintendo didn't even create the game! It was originally a Japanese game called Yomekojo Doki Doki Panic.
It's a change. I think it's better that way.