This is a list of enemies from Mega Man 4.
Enemies
| Name | Description |
|---|---|
| 100 Watton | |
| Battan | |
| Battonton | |
| Biree | |
| "Boulder" | |
| Docron | |
| Dompan | |
| Escaroo | |
| Gachappon | |
| Garyoby | |
| Gyotot | |
| Haehaey | |
| Helipon | |
| Hover | |
| Imorm | |
| Jumbig | |
| Kabatoncue | |
| Ladder Press | |
| M-422A | |
| Mantan | |
| Metall EX | |
| Metall Swim | |
| Minoan | |
| Moby | A robot whale who is a mini-boss in Dive Man's level. |
| Mono Roader | |
| Mummira | |
| Pakatto 24 | |
| Puyoyon | |
| Rackaser | |
| Ratton | |
| Ring Ring | |
| Sasoreenu | |
| Sea Mine | |
| Shield Attacker | |
| Skeleton Joe | |
| Skullmet | |
| Super Ball Machine Jr. | |
| Swallown and Coswallown | |
| Taketento | |
| Togehero | |
| Tom Boy | |
| Totem Polen | |
| Up'n'Down | |
| Wall Blaster | |
| Whopper |
Robot Masters
| Robot Masters | Special Weapon | Weakness |
|---|---|---|
| Bright Man | Flash Stopper | Rain Flush |
| Toad Man | Rain Flush | Drill Bomb |
| Drill Man | Drill Bomb | Dive Missile |
| Pharaoh Man | Pharaoh Shot | Flash Stopper |
| Ring Man | Ring Boomerang | Pharaoh Shot |
| Dust Man | Dust Crusher | Ring Boomerang |
| Dive Man | Dive Missile | Skull Barrier |
| Skull Man | Skull Barrier | Dust Crusher |
Bosses
| Bosses | Weakness |
|---|---|
| Mothraya | Ring Boomerang |
| Square Machine | Dust Crusher |
| Cockroach Twins | Drill Bomb |
| Cossack Catcher | Dust Crusher |
| Metall Daddy | Dust Crusher |
| Tako Trash | Ring Boomerang |
| Wily Machine No. 4 |
Ring Boomerang (First form) / Drill Bomb (Second form) |
| Wily Capsule | Pharaoh Shot/Ring Boomerang |