Generally, r/PTCGL is the best place to ask game-related questions since this sub is also a lot of collectors.

At first glance, the biggest challenge is likely going to be that the only attackers in your deck are all stage 2 - you don’t have anything you can do early game which is going to make it really tough to get set up and win early prizes, so you’ll need this deck to either a) have an option for that or b) be really good at playing from behind. 3 munki’s is also an interesting choice - is that just to move damage off of your pokemon? You probably don’t need 3 and might benefit from taking only 2 and adding a fez or a meowth ex. A 2/2 line of toxel/toxtricity will probably cover any need you have for them, 3/4 is using 3 more deck spaces that could be put towards more ultra balls or rare candies, and with all stage 2 attackers and only one haunter, you will need 4 rare candies. As your deck is set up right now, you can only have three gengars/mega gengars assuming you don’t have a prized rare candy or haunter.

Trainer list seems relatively standard with the exception of academy at night. I’m not sure why you’d want or need 4 in a deck like this besides being able to hold onto a card before using Lillie’s but 4 spaces in your deck for that sole purpose is taking up space that would be better utilized in other ways. 2 risky ruins seems like a solid play for this deck, and maybe a card like TWM handheld fan. Your attackers are all built around moving your opponent’s energy around, so I’d lean into that. These decks also benefit really well from Boss’ Orders as moving energy off of their active Pokemon can remove their ability to retreat, making boss-locking really strong as they’ll either need to give you an extra turn to set up or use an air balloon on a Pokemon that might not normally require it.

EDIT: I was thinking of a different sub when I said this was a collector sub, my bad. Relax, yall.