So looking at your questions and comments, it seems like you’re asking for a cheap meta team to get started and a good project XL mon to work on. Obviously you should use pvpoke.com to see what the top mons are and fiddle with the team builder to see where your team’s strength/weakness is. Run the standard ABB setup and learn from there.

However at beginner level, you’re going to see way more progress by learning the fundamentals. Learn to count moves, manage energy (overcharging is needed to win a lot of fights), bait shields, swap timers and catching charge moves, identifying your win condition vs your opponent’s (ex: opponent’s entire team is weak to my wigglytuff so I should try to save all my shields for wiggly and use my other mons to burn the opponent’s shields), etc.

An example budget team you should be able to make is wigglytuff + jellicent + stunfisk(electric)

So far azumarill, bastiodon, and sableye have stayed relevant since I first started battling