This is basically a list of the breedings in the game that can only be achieved with a link cable. Right now I've only studied up through Species + Species breedings.
| Pedigree | Mate | Result |
| Slime | BigRoost | WonderEgg |
|---|---|---|
| Dragon | AquaHawk | SkyDragon |
| Dragon | Lionex | Serpentia |
| Vampirus | AquaHawk | Vampirus |
| Almiraj | Healer | Unicorn |
| HammerMan | LizardMan | Dumbira |
| BeastNite | MerTiger | NoctoKing |
| Trumpeter | Garudian | GulpBeast |
| MadCat | LampGenie | DarkHorn |
| AquaHawk | WingSnake | MadCondor |
| Garudian | Trumpeter | Shantak |
| Warubou | Watabou | Watabou |
| Bubblemon | DeadNite | GateGuard |
| BossTroll | CurseLamp | LampGenie |
| Grendal | Skeletor | ChopClown |
| LampGenie | MadCat | ArcDemon |
| DeadNite | Bubblemon | CaptDead |
| Skeletor | Grendal | Niterich |
| CurseLamp | BossTroll | Balzak |
| Roboster | Roboster | Roboster2 |
| EvilPot | Bubblemon | BombCrag |
| MerTiger | BeastNite | AxeShark |
Vampirus + AquaHawk = Vampirus is not a typo. I triple-checked. Roboster + Roboster = Roboster2 is another notorious waste of space since Roboster's +5 breed already does exactly that.