Hybrid Units are units randomly assigned special abilities by the player. Choose 2 units types at random. Average their units values (rounding towards the first one chosen). They have the special abilities of both.
Many of these unit types are somewhat silly and will not work properly in TripleA. Note that TripleA has units as land units by default and isAir and isSea as properties. In over the board play, you can make hybrid units capable of the movement type of either partner.