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
If you want to get Bowser Jr. in Mario Kart Wii, I will show you how to unlock him; To unlock Bowser Jr. you must get a star rank (1,2, or 3) in all of the retro cups of 100cc. After this you can be awarded Bowser Jr.
NO.
it is impossible he isnt in the game
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)
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
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.