| Jackaleopardite | 26 | 3,557 | 227 | — |
| Jackaleopardite Elder | 44 | 8,941 | 386 | — |
| Jackaleopardite Morphling | 41 | 7,780 | 360 | |
| Jackelman | 95 | 225,522 | — | — |
| Jackelman Slave | 98 | 251,337 | 2,768 | |
| Jade Eidolon | 62 | 59,284 | 1,580 | — |
| Jade Flamewisp | 4 | 172 | 33 | |
| Jaden Chunk | 150 | 39,678 | 1 | |
| Jaden Elfire | 6 | 303 | 52 | |
| Jaden Qingfu | 1 | 29 | 8 | |
| Jaden Rutiodon | 150 | 1,479,222 | 876 | — |
| Jaden Vipion | 31 | 3,908 | 332 | |
| Jaeger: An | 99 | 4,175,730 | 26,092 | — |
| Jaeger: Ku | 99 | 4,175,730 | 26,092 | — |
| Jaeger: Lang | 99 | 4,175,730 | 26,092 | — |
| Jaeger: Li | 99 | 4,175,730 | 26,092 | — |
| Jaeger: Lu | 99 | 4,175,730 | 26,092 | — |
| Jaeger: Lun | 99 | 4,175,730 | 26,092 | — |
| Jaeger: Ou | 99 | 4,175,730 | 26,092 | — |
| Jaeger: Shang | 99 | 4,175,730 | 26,092 | — |
| Jaeger: Shui | 99 | 4,175,730 | 26,092 | — |
| Jaeger: Wu | 99 | 4,175,730 | 26,092 | — |
| Jaeger: Yi | 99 | 4,175,730 | 26,092 | — |
| Jaeger: Yu | 99 | 4,175,730 | 26,092 | — |
| Janeeva | 60 | 88,330 | 526 | — |
| Jawbone Oddfoot | 33 | 4,287 | 290 | — |
| Jealous Cactopod | 17 | 1,716 | 148 | |
| Jealous Ex | 70 | 30,000,000 | 1 | — |
| Jewelscalen | 55 | 271,347 | 1,282 | |
| Jokul Serpent | 16 | 1,653 | 138 | |
| Jumang | 34 | 103,200 | 722 | |
| Jumby Succubus | 24 | 2,597 | 211 | — |
| Jumby Temptress | 23 | 2,445 | 204 | |
| Jungle Destroyer | 150 | 80,000,000 | 87,500 | |
| Jungle Guardian | 150 | 80,000,000 | 87,500 | |
| Jungle Hunter | 150 | 80,000,000 | 87,500 | |
| Jungle Patrol | 150 | 80,000,000 | 87,500 | |
| Jungle Scout | 150 | 80,000,000 | 87,500 | — |
| Jungle Scout | 150 | 80,000,000 | 87,500 | |
| Kancer of the Shallows | 36 | 4,946 | 364 | — |
| Kashu the Hirudini Myriadept | 52 | 279,132 | 918 | |
| Khewy, Rattus Lord | 55 | 271,347 | 969 | |
| Killer Antitan | 31 | 3,908 | 273 | — |
| Killer Drone | 28 | 3,960 | 294 | — |
| Killer Fire Antitan | 35 | 4,849 | 308 | — |
| Killer Hornet | 28 | 3,960 | 299 | — |
| Killer Wasp | 26 | 3,557 | 276 | — |
| Kimsa the Claw King | 62 | 340,946 | 1,305 | |
| King Carapest | 30 | 4,552 | 264 | — |
| King Grimalkin | 42 | 8,072 | 367 | |