If you are at all worried about total playables you are rarely going to pick a sideboard card over a main deck one
Power Nullifier: While normally you are limited to a single Supporter Card per turn, several Pokmon from Genetic Apex can prevent your opponent from activating them at all, such as by successfully resolving Psyduck's attack, or by having Gengar ex as your Active Pokmon
By the way, the race and attributes are covered with the Special Summon meta pakike, but the pakike itself is far superior to the barrier statue series
Most Leaders would struggle with this many Events, but this deck's Leader effect allows you to play Events from your hand at a lower cost, and also features multiple Characters that become stronger the more Events are in your trash
Monarch Overview Monarch is a control deck that tries to gain and maintain both an advantageous board state and general card advantage using cards like Mobius the Frost Monarch and Zaborg the Thunder Monarch
Otherwise, if youre not trying to get too fancy with your card designs, everythings fairly straightforward