Tornadus with roost would be a nightmare probably game freak really likes pokemon having a typeyeah, everything that needs roost and makes sense to have the move this gen has it, except for:
- gliscor, which is one of the best mons in the meta without it
- the genies/therians, which never had it (largely because prankster roost would be very annoying, and if they only gave it to landorus and enamorus, the other two would complain to hr)
- the crown tundra birds, which also never had it for some incomprehensible reason (clown tundra moment)
- tropius, which just uses harvest instead
- honchkrow, probably because they knew how bullshit good murkrow was going to be in vgc and decided it didn't need the help
- charizard, which you'd really think game freak would have made an exception for but they shockingly didn't
- staraptor, which… wait, what the fuck? staraptor doesn't get roost this gen? since fucking when
- delibird, which is a meme-tier mon anyway
- mew, which, well, fuck mew i guess