Enemy names from the R10 Image Soundtrack:
Mechapitchan (pun on mecha and pitching-chan) - baseball throwing robots
Kaona-geeno (pun on "Kao nagee no" or "did he just throw his face?") - head chucking ssnowman robot
Bomb Potton - bomb-dropping bug copter
Marserker (maybe a pun off "masaka"/"no way!") - hopping axe robot
Shottem - flying ball-spitting helmet robots
Yombain (pun off "yon" and "bai" or "times 4") - the square robots that bifurcate
Bari III - the platform-headed pole robots
Dahspider - spider robots
Neo Mettool X - walking mets
Neo Heli Mettool - flying mets
Nu-Mettool (pun from "numeru" meaning "slimy") - slug mets
Moremole - boring drill robots
Kaettekita Machine Gun Joe ("Returning Machine Gun Joe") - you know
Searcher - searchlight robot that changes the direction of conveyor belts
Shrimpurge91 - shrimp robots
Trio de Toride ("toride" meaning "fortress") - TriCastle mini boss
New Classical Cannon - big round floor-mounted cannons
Haiker N (pun off "haikan" meaning "plumbing") - flying pipe robots that look like tellys
Arigock G (pun off "arijigoku," an ant larvae pit) - the red ground-based spitting robots
Pointan - computer mouse pointer robots
Sprinklan - spiky floor patrolling spring trap robots
R Suzy - this game's Suzy robot variation
Tsurarestamp ("tsurare" means "to be lured") - giant stomping robots
Swallowegg - jet birds that launch egg missiles
Kargor Q (pun off "kago" meaning "cage" where sport balls are kept ie at recess) - the ball launching cage robots
Separoader (roader that separates) - wheel enemy with a flying cannon on top
Wartriot - missile launchers that move along the walls
Dokkalocker ("dokka" is an onomatopoeia for flopping open) - sport locker enemies
Oshitsuosarettsu - tall shielded robots that rush at you
Suzakk and Fenikk - fire bird duo mini bosses
Fuuraibomb (pun off "fuuraibou" meaning drifter) - parachute bombs that fly out of pits
Shield Attacker T R L - flying robots with shields over their faces
Piledon - orange flying enemy that connects with a base to increase its attack power
Garinkor - hopping spiky enemy
Solar 0 - flowers that shoot beams
OctoPachiPachi - giant Octobulb mini boss
Little PachiPachi - the mini octos sent out by OctoP.P.
Goaliekeeper - giant goalpost mini boss
I think that's it. By the way, the damage data chart is missing that Enker's beam attack can be reflected with Mirror Buster, I think for just 1 damage each.