Quote Originally Posted by mouseno4 View Post
Chocobo's are granted 25% of the XP you would get yourself from a kill. So if you got 100 XP for your character, it would get 25 XP itself. Keep in mind that a Chocobo actually TAKES XP away from you, for itself. So for my example, 100 XP for you and 25 for the Chocobo, means if it was not summoned, you would have gotten 125 XP.

The XP notation in the battle log appears somewhat odd to say the least.

Your personal experience is as follows:
"You gain <amount> (<percent>%) <class> experience points."

Your Chocobo's experience gain is as follows:
"You gain <amount> experience points."
This is not true, Chocobos get 100% of the XP you do without boosts (rested/non-chocobo FC buff/Off-class buff) but only from mobs you do over 25% of the damage to and/or claim. The best way to level is FFXI style and stand in one spot and just grind on mobs. It sucks, but it is the only way to level a chocobo. The only exception to the no bonuses rule is EXP chains which will buff both you and the chocobo equally.