The enemies are painted with the ROM's patterns over what they do in openMSX (tools/enemigos.py).
There are 65 enemy types, each with a 7-byte record (p01:6C5D).







In the MSX version the enemies are named after heavy metal bands. The cartridge does not carry them; these are the 43 from the Gradius Wiki, with the series enemy each one matches. The wiki gives no picture for each name, so they are not matched to the sheets above.
| MSX name | In the series |
|---|---|
| Celtic Frost | Fan |
| Missing Link | Garun |
| Nuclear Assault | Rugal |
| M.O.D. | Amoeba |
| Buster | the same |
| Gedee | Sparug |
| Death Hand | the same |
| MC5 | Bamda |
| Sanovich | Octa |
| Fang Prominence | Sharp Cross |
| Possessed | Amka Kemdomira |
| Whiplash | the same |
| Vice | Valganis |
| Deadly Death | the same |
| Junker | Hatch |
| Leper Messiah | the same |
| Spatiotemporal Stone | Meteor |
| Legacy | the same |
| Option Eater | the same |
| Killer | the same |
| Guster | Ug |
| Artillery | the same |
| Gremlin | Ducker |
| Volcano | the same |
| Hazard Ball | the same |
| Omen | the same |
| Gamma | the same |
| Gun Ho | the same |
| Outfield | the same |
| Crusher | the same |
| Led Zep | the same |
| Heathen | the same |
| Rage | the same |
| Battle Axe | the same |
| Q-Prime | Destruction |
| Poser | the same |
| Creeping Death | the same |
| Aberrant | the same |
| Ozzy | Dee-01 |
| Running Wild | Ducker |
| Battery | the same |
| Exodus | the same |
| Sucker | Jumping Moai |