This is my version of Boom-Boom. Although dangerously accurate of his official appearance (pardon my laziness, but at least I was trying to make it look right), in addition of spikes on his shell like his old days and New Super Mario Bros. U and a few others, the details are obviously less notable than in main series games.
The Boom-Boom species are not the smartest type of Koopa, but their strength comparable to Morton and Roy, and even near-matches Bowser, do make up for it. They are generally aggressive and does not like having to deal with intruders constantly. They use their arm for flailing and spinning around, but the second attack would leave them dizzy. They are often with Pom-Poms and Pow-Pows, making the situation with them harder. As if it is not enough, there is a new variation (coming soon) of Boom-Booms called Elite Boom-Booms, which while not having the same DEF of Koopatrols, the Elite Boom-Booms had higher ATK, making them significantly more dangerous for the reckless.
Normal Boom-Booms had 12 HP, 3 ATK and 1 DEF when not tripped, Elite Boom-Booms had 20 HP, 5 ATK and 2 DEF, Big Boom-Booms had 22 HP, 5 ATK and 2 DEF, and the most dangerous among them, Big Elite Boom-Booms, which got 30 whopping HP, 6 ATK and 3 DEF, but they are super rare and drops 200 Star Points, 50 Blue Spheres and 250 Coins when defeating just one of them.
A notable member of the species, which is much bigger than a Big Boom-Boom and also stronger, called Aboomina Slim, Lumaloo the Kid's strongman. With 150 HP (Bosses have very high HP in Chapter standard but your partners and sometimes temporary allies will help), average ATK of 6, and Defense of 4 when not tripped down, he is a force to reckon with, but thankfully, you will only face him at the end of Chapter 6, and the Cape Feather or other Power-Ups involving spinning (but preferably the former one) will deals double damage, ignores his Defensive Perk, and tripped him down for two turns, and you got the reluctant Waluigi to back you up once you had taken Lumaloo down, with his cannon that deals 35 ATK on Aboomina Slim!
Boom-Boom, Paper Mario series @ Nintendo