| Boney Thief | 13 | 1,056 | 115 | |
| Boniron Valiant | 39 | 5,899 | 344 | |
| Boomeranger | 150 | 7,540 | 1 | |
| Boondock Chisler | 15 | 1,175 | 136 | |
| Boondock Rhinodrake | 7 | 297 | 63 | |
| Boulder Walker | 150 | 180,000 | 1 | — |
| Boxer | 50 | 1,648,368 | 1 | |
| Box Ghoul | 2 | 71 | 15 | — |
| Brambleback Centipex | 24 | 3,174 | 210 | — |
| Brambleback Centipex King | 25 | 3,363 | 218 | |
| Bramble Cactopod | 4 | 156 | 35 | |
| Brigand Assassin | 78 | 24,817 | 686 | |
| Brigand Cutthroat | 79 | 106,705 | 2,082 | |
| Brigand Cutthroat | 79 | 106,705 | 2,082 | — |
| Brigand Transient | 84 | 2,334,709 | 1,771 | |
| Brigand Transient's Spirit | 65 | 5,324,905 | 1 | |
| Brimstone Harpy | 41 | 22,457 | 911 | |
| Brimstone Towerling | 40 | 30,896 | 889 | — |
| Broadblade Runner | 92 | 277,132 | 747 | — |
| Broadkris Drudge | 150 | 23,977,103 | 876 | — |
| Broken Mind | 80 | 6,906,392 | 1 | |
| Bronze Crawler | 150 | 50 | 1 | — |
| Brownscarf Walker | 150 | 33,614 | 1 | |
| Bst Turret building in progress | 1 | 250,000 | — | — |
| Bst Turret building in progress | 1 | 250,000 | — | — |
| Bucktooth Lynxus | 10 | 711 | 85 | |
| Buddha's Grasp | 150 | 48,639 | 1 | |
| Buddha's Servant | 150 | 3,970,734 | 840 | — |
| Buddha's Servant | 150 | 264,716 | 840 | — |
| Buddha's Servant: Mirror | 150 | 520,973 | 831 | |
| Bulldoc Massacrer | 85 | 153,342 | 745 | |
| Bullfrog | 1 | 36 | — | — |
| Bumblee Terror | 29 | 4,333 | 306 | — |
| Burning Bug | 150 | 180,000 | 1 | — |
| Burning Soul | 150 | 5,294,312 | 845 | — |
| Burning Soul | 150 | 5,294,312 | 845 | — |
| Burning Soul | 150 | 264,716 | 845 | — |
| Burning Soul | 150 | 5,294,312 | 845 | — |
| Burning Soul: Mirror | 150 | 520,973 | 834 | |
| Burning Spirit | 85 | 163,719 | 1,795 | |
| Burrow Flea | 80 | 26,004 | 705 | — |
| Burrowing Nien Minion | 100 | 19,764 | — | — |
| Burst Turret | 1 | 5,000,000 | — | — |
| Burst Turret | 1 | 5,000,000 | — | — |
| Butterfly Faery | 150 | 5,000,000 | — | — |
| Butterfly Faery | 150 | 5,000,000 | — | — |
| Butterfly Faery | 150 | 5,000,000 | — | — |
| Butterlier Buster | 150 | 13,187 | 1 | |
| Cabinet Spirits | 2 | 71 | 15 | — |
| Cacoon Spirit | 95 | 184,518 | — | — |