Demi-Bahamut has several technical details that need to be considered when creating a replacement. 

• Demi-Bahamut is classified as a flying/floating creature.

• Demi-Bahamut is affected by in game /petsize commands.

• Demi-Bahamut is technically a variant of Bahamut Prime, and is the same base size and skeleton as Bahamut Prime. The summoned version has a background scaling factor that reduces its size to 30% of its normal size when set to Large.

When thinking about what kind of creature you want to use for a replacement, think about some details about the creature.

• If it's a terrestrial creatures, does it have a movement animation? Some terrestrial creatures, like Menphina with Dalamud, are stationary and thus do not have movement animations necessary for a terrestrial creature to appear to be walking or running. This is usually not an issue for floating/flying creatures that can get away with using their idle for movement.

• Does it have any attack animations? Mounts do not usually have attack animation unless they are a variant or used in combat somewhere in the game. This can make creating a replacement far too difficult to execute well, which may result in me turning down the commission request.

• Does the creature have particular attacks that you already know of that you can see replacing particular abilities that the summon has?

Creature replacement mods are an advanced asset replacement that can be difficult to calculate a price for. Their price is considered separate from the job that summons them too. Estimate to be quoted $5 for each core component and $5 for each Ability Component.

For a full Demi-Bahamut replacement expect to be quoted around $60