Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
is it possible to make it so toxic and mortal spin can't generate on the same set? i feel like 2 slots on moves that inflict 100% poison isn't ideal even if mortal spin does remove hazards, i'm not saying to remove either move but if you can make it so they can't generate together
i think tera steel okidogi would be really good, get a ton of new resists making it easier to setup bulk ups in front of a lot more things and it would still get rid of your quad weakness to psychic
i don't like shed tail as an option for smeargle at all, i find that you'll never really get a good opportunity to use it since smeargle is really frail and almost always gets sent down to its focus sash and even if you do pull it off you lose 50% health, lose your focus sash and have no means...
i get that aeroblast is 25 bp stronger than air slash but 8 pp is a huge problem on it imo, i find that i can never get sweeps with lugia since its special attack stat is very mid + i always run out of pp on aeroblast, i think having 16 more pp + a flinch chance with good speed is better
i don't like tera grass on appletun, i don't think a slight boost on apple acid is worth it when you pretty much only gain being neutral to dragon and fairy, i find tera steel to be better in every way
could you test infestation on dipplin? i find it doesn't really do much but sit there whenever i have it and getting passive damage and trapping a mon could be pretty decent on it with good bulk
i think ice beam on the deoxys speed setup sweeper set would be a good option, that set currently only has 4 options and it'd be a really good coverage move to pull, could maybe make it a 50/50 with dark pulse
i think power herb meteor beam iron jugulis would a decent option to add, the mon is choice locked normally and has no setup however now it can get a big hit off with meteor beam and get a +1 special attack boost without having to be locked into 1 move
is it possible to enforce flip turn on banded floatzel? i find it, wave crash and ice spinner to be the only must moves so i think it being a 50/50 between crunch and low kick would work better