You can win 3,450 races
to unlock Bowser jr. all you to do is play as Bowser in classic mode 1000 times
You can't unlock Bowser Jr on Mario Kart DS.
No, neither are unlockable.
to get Bowser jr on mkw, get rank star on all cups on 100cc.
unlock him, or in some games fight him
NO.
it is impossible he isnt in the game
to unlock bowser jr and metal sonic you need to complete the game and at the end bowser jr and metal sonic agree to put green missions on all of the towns and islands complete all of them then bowser dr eggman bowser jr and metal sonic join you
Deafeat bowser 2 times and have princess peach on your team. (to get peach beat bowser jr in peach ice garden and you will get her)
You can't.
It looks like unlocking any other character or vehicle or anything of that sort, except with Bowser Jr. there. If you're also wondering how to unlock Bowser Jr.: Complete all 100cc Retro cups with at least a one-star ranking.
Oh, what a happy little question! To unlock Bowser Jr. in Mario Kart Wii, all you need to do is get a one-star ranking or higher in all 100cc Grand Prix cups. Just keep painting those beautiful racing lines on the tracks, and before you know it, Bowser Jr. will be cruising alongside you with a big smile on his face. Just believe in yourself and enjoy the journey!