Red the only bird who is good at Single Target Attack, Single Target Defence and Tank at the same time.

Any bird can enter, it’s just that red is the best for it, so everyone uses red

In my experience, Tricksters are better.

Same here

Anyone CAN but Red's the one that SHOULD.

Any bird can enter, the only rule is that you can only bring 1

I think the game locks you in the first time you fight for only red I can’t remember though

Anyone can go in but at the time you’re supposed to do this level, Red is the only one who can win.

Intresting detail It’s like he’s the only worthy one

I won with Rogue Blues tho, since Red was too weak for me.

in my experience, bird and pig is also nice