I am wanting to get a Aerial ace Slaking, and I have a flying Tera Breloom. I used TM027 on Breloom and i'm in a situation where I don't have the time to make another TM027. I only have the option currently to breed seeing as I am unable to go to area zero at level 40. I have to then chain breed seeing as Breloom is in Grass/Faerie egg groups and Slaking is in Field. Why do I have time to breed but not to make another TM? I also want Ice hammer Tinkaton and Belly Drum/Superpower Cetitan. I am doing a picnic anyway because of that. Can Pachirisu learn aerial ace by breeding, or is there another option?
Both Pachirisu and Slaking can only learn Aerial Ace via TM in Gen 9. You'll have to gather 3 Starly Feathers and 3 Flechinder Feathers to craft another TM at the TM Machine at any Pokemon Center outpost in the field. This will also cost you 800 LP.
Source: https://pokemondb.net/pokedex/pachirisu/moves/9#egg-move-parents https://pokemondb.net/pokedex/slaking/moves/9#egg-move-parents