What is the best way to attack a monster bunkerin backyard monsters

The best way is catapult some Twigs or either Pebble maybe putty if you have a lot because putty is light and pebble is the best way because they are solid! (ROCK HARD)

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@above answer
Dude, putty doesn't damage buildings....
If you want to destroy the bunker, catapult it until it's hit points are below 50%. If you want to bait it, find out the monsters in the bunker. If it's all eyeras, send in a few pokeys at a time. The eyeras will run for it. If there are strong monsters inside (like DAVES), send in eyeras.