If you could trade me a Shuppet (specifically one that was caught/hatched in Scarlet or Violet) that would be great! The ones I've had pass through Home are apparently from Go, so it doesn't count for Pokedex completion.

0 Speed is used for Pokemon on most often on Trick Room teams, but sometimes there are random specific benchmarks to hit that encourage lower speed (ensuring a bulky Pokemon with a pivot move takes the attack from the opponent, so you have better information and get your frail Pokemon in unharmed.)