Rainhawk
Requirements: Two birds, Slime*, Coatol(not needed, but helpful. Otherwise, use any kind of dragon), Teto's Iceman
If you are wondering how you can get a Coatol while still being able to breed with Teto's Iceman, breed Pteranod with MadKnight. Also, Coatol and the Slime must be opposite genders. Remember to level up your monsters enough so they will have fairly high stats and learn certain moves. I recommend using Healer as the Slime to breed for DrakSlime.
GoldSlime
Requirements: Many meat treats, access to Gate of Control
Train all your monsters to the max level with Mettables before breeding.
GateGaurd
Requirements: Picky, Gremlin (must be opposite sex of Picky), Demonite
Divinegon
Requirements: SkyDragon, BattleRex, Golem, MedusaEye
You can get a MedusaEye by breeding a Demonite with DragonKid. This is designed so you can get a Divinegon right after you beat the Gate of Anger and get BattleRex. You will also need to have held on to your Golem from the Gate of Talisman. Get the SkyDragon from the farm before you beat the Gate of Anger. It will take an eternity to level up Divinegon this early, added on that Dragons take longer to level up.
WhipBird
Requirements: A bird, access to May's Rayburn
As you may of noticed, the requirements for this WhipBird is very low. However, there will be a big difference in what kind of WhipBird you will get. Try to add pluses with the bird you breed in. I suggest to use a Wyvern with a breeded in MadCondor so WhipBird can get Heal and HealUs.
ManEater
Requirements: EvilSeed, GoHopper, Devil*, Plant*