Bullet Trio ~May Be Redrawn~

Kayswim (casing+swim)
casing pokemon
water/steel type
ability: battle armor
2'3''
31 lbs
evolves into Bullukayse when lvled up with Bullusquid in battle

"Its scales have fused into one, surrounding its body with a tough shell. Its mouth, eyes, and fins still stick out, and it moves by cycling water through its body."

Bullusquid (bullet+squid)
Pellet pokemon
water type
ability: swift swim/marine lace
2'7''
29 lbs
evolves into Bullukayse when lvled up with Kayswim in battle

"Their tough outer shells protect them when they shoot through the water. The round balls are short tentacles that have evolved to form ink sacs."

Bullukayse (bullet+casing)
bullet pokemon
water/steel type
ability: slip through/inconsistent
3'1''
48 lbs
evolves into Octomic when lvled up with grimer or octillery in battle
evolves from Bullusquid and Kayswim when lvled up together in battle

"They shoot through the water at high speeds, destroying anything that gets in the way. Their combined shells are hard enough to survive crashing into an underwater mine, and smooth enough to burrow a perfectly round hole in corals."