i vote for dropping the togetic altogether. hustle is absolute ass and is only a handicap, and HGSS is terrible for leveling up, and being so late to the game, you're looking at HOURS of grinding just to get back where you were. put fly and rock smash on togetic and carry on using the other Pokémon instead. it's better for the level grind to have fewer pokemon anyways.
if you really love togetic/kiss, it'll be fine to keep on your team.
alternatively, you could reroll and keep it and others in the daycare and grind that way idly.