Baku Available from the start. (Requires larger barn)
Beaklon
Centaur Enter & win the Big 4 event on 06/01.
Colorpandora Available from the start.
Dragon Achieve Breeder Rank B. If you have a Rank B monster on your ranch or in your freezer, you will be invited to a Rank B Invitational on the 3rd week of February, where you will face a Dragon:
Doreora Pow 504 Int 212 Ski 333 Spd 365 Def 455 Lif 412
Defeat the Dragon to win a Dragon Tusk, which can be used in combination to create a Dragon. Dragon can then be regenerated at the shrine (larger barn required).
Durahan
Ducken Available from the start.
Falco Available from the start. (Requires larger barn)
Gali Enter the Big 4 event on 12/1. If you win the tournament, you'll get the Gali Mask. Use the mask in combination to get Gali.
Golem Available from the start. (Requires larger barn)
Hare Available from the start.
Henger Wait for the tree on the south-west corner of your ranch to mature completely (this may take several years). Have your monster inspect the tree during August. You will find a yellow crystal which triggers an event in which a brown monster is seen pecking at the tree. Clare identifies it as a Beaklon and asks you if you want to approach it. If you select yes, you will be attacked by the startled monster; a Henger. Defeat the Henger and the BOMBA chairman will pay a visit to the ranch. You will obtain a Henger Doll, which can be used in combination to create a Henger. Henger can then be regenerated at the shrine. (NOTE: The Henger is very powerful, with all stats well over 400+. A or S Rank monster recommended)
Joker
Lesione Available from the start. (Requires larger barn)
Mew Available from the start.
Mocchi Available from the start.
Monol Enter & win the Big 4 event on 03/01.
Naga Enter & win the Big 4 event on 09/01.
Ogyo Available from the start.
Pancho Available from the start.
Phoenix Go on an expedition to Volco (volcano; must be Breeder Rank S) and search near the start for a yellow event crystal. A Phoenix will fly into view and start circling towards the center of the volcano. Further along, on the north-eastern part of the map, you will find another yellow crystal, which forms a bridge across a pool of lava, leading to a small island. Search the island for a Gold Peach. Move on to the south-eastern corner of the map. Another event crystal will appear nearby. You will find the Phoenix from earlier, which appears to be injured. Your monster will ask you give it the Gold Peach. If you say yes, the Phoenix will recover and fly away. As it leaves, it will drop a Phoenix Feather, which can be used in combination to create a Phoenix. Phoenix can then be regenerated at the shrine.
Piroro Available from the start.
Pixie Available from the start.
Plant Available from the start.
Suezo available from the start.
Tiger Available from the start.
Xenon *IN PROGRESS* Go on an expedition to Promiass (pyramid; must be Breeder Rank A) and search for two mysterious shards called Ancient Reliefs. When both have been found, a yellow event crystal will appear on the south-east corner of the map. Approach the crystal and the Ancient Reliefs will react and summon a Xenon. Fight and defeat the monster to obtain a King's Crest, which can be used in combination to create a Xenon. Xenon can then be regenerated at the shrine. (NOTE: The Xenon is extremely powerful, with 899 Lif and similarly high offensive stats. Bring a similarly strong Rank S monster)