Duck SMASH!
Smash Journeyman
I got destroyed by a Sheik yesterday.
Similar to the Fox matchup, Sheik has the mobility and fast powerful attacks to completely swarm Bowser Jr.
I have not tested her needles vs the Mechakoopas, but I think the needles shoot through the MK and hit Jr. anyway. They are piercing projectiles so that's my guess, but that needs testing. And it doesn't offer help against a jumping Sheik who aims downwards.
Jr can auto cancel his aerials and still hit Sheik, but she's so fast that I can't even Ftilt them before Jr gets grabbed or knocked back.
What do you guys think of this matchup? I don't think Jr has the advantage this time...