TM61

TMs vary between generations; however, TMs numbered 51 to 92 were not added until Generation IV; TMs numbered 61 to 100 do not exist in Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!.

TM61 is:

TM61 MT61 CT61 MT61 わざマシン61 招式学习器６１