Balmung Server (maybe XIV) First: Rank 20 Chocobo?

[HEC-]

At rank 19 what percentage of your chocobo's exp did training at a good condition stable give you? I saw at 10 it's no longer 1%. Does this decrease per level?

I don't believe after ten its a percentage anymore. I seem to recall it being around 18k at 11, and it was around 18k at 19 as well.

From level 10 onvards (after using first Thanvarian Onion) it keeps rewarding the same amount of the XP as at level 9 so you need more and more Krakka Roots for each level (it's about 0.9% at level 10 resulting in just over 111 Krakka roots for that level). So in principle - the XP gained by training is "frozen" on the last pre-onion level and as result the percentage goes down as the XP needed for each next level goes up. It's about 0.6% only at lvl 15 or so. The good news is that weekly Challenge Log bonus is still full 15% (5 + 10) of the current level max XP (note though that it shows as zero while chocobo is stabled)