The Byleth also beat Akio's Shulk after Leo was down 1-2 with Joker. Edit: I think Leo practiced the Byleth for the Asimo rematch he was seeded into. So yeah, I think the Byleth is here to stay for now.
By the way, the angel platform giving you more invincibility is a myth. If you stay on it longer, you get less invincibility moving around afterwards. The timer starts as soon as the platform spawns, not when you jump off of it
as a pika main shiny mark makes me mad everytime zzzzzzzz y tf he stalls that much and doesn't play optimal when winning until he loses? whyy shiny? whyyyy?