Cheat codes:
Monkey Unit:
Whilst in game, open the chat box and type 'FURIOUS THE MONKEY HEAD' This will give you a monkey unit which appears at the town center.

The Monkey & Flying Dog:
In The Conquerors all the cheats from Age of Kings can be used plus two more cheats. To use both cheats first press Enter in-game and a chat box will open. Type 'woof woof' to turn all birds into dogs and 'furious the monkey boy' to get the monkey unit.