qfe. We are only tiering pokemon that are obtainable before you beat Cynthia; everything else is irrelevant for this list. On Spiritomb's underground interactions - it is fairly simple to meet 32 people underground if you have access to the second console + game. Entering and exiting your secret base (while blocking the entrance) counts as having left the underground, so you can simply dig a base and have the second game's character stand outside it. You can probably do this in about 10-15 minutes.