All of the ones you can buy in the shop i think

Anything that can be bought with coins in the shop. If you're asking about run eligible decks, Mach strike is the best from what I've tried.

Decks that can be bought from the shop or from a code can be used. Really the only ones we do not allow are the base decks. The reason for this is that the base decks rotate. So after a while, the base deck that new players get today will not be available. Its keeps the run from going out of date in the future.

There are rules on each speedrun challenge page.

Here they are:

Rules

• Only decks that may be gotten from codes may be used. *Decks obtained from the in game shop that are obtainable through code cards may also be used.
• Decks must be from the XY set or newer.
• Default/Starter decks given to you when making an account can not be used. These have a chance to rotate and be unobtainable.
• Timing starts when you click on the "Play" button to start your first battle.
• Timer stops when the victory screen for the last trainer you battle appears.
• You are allowed to use whatever Playmat Options you like.
• May only use one deck.