Mount Speed upgrades
This is the one everyone wanted to know. And surprisingly, not all mounts gain a speed increase from upgrading their Partner Skill. In fact, most mounts do not get a speed increase at all. The following mounts are the ONLY ones that do:
Mounted speed Increase (%):
| Number | Name | Lv1 | Lv2 | Lv3 | Lv4 | Lv5 |
|---|---|---|---|---|---|---|
| 26 | Direhowl | 10 | 12 | 15 | 20 | |
| 38 | Nitewing | 10 | 12 | 15 | 20 | |
| 42 | Arsox | 10 | 12 | 15 | 20 | |
| 59 | Reindrix | 10 | 12 | 15 | 20 | |
| 60 | Rayhound | 10 | 12 | 15 | 20 | |
| 61 | Kitsun | 10 | 12 | 15 | 20 | |
| 65 | Surfent | 10 | 12 | 15 | 20 | |
| 65 | Surfent Terra | 10 | 12 | 15 | 20 | |
| 93 | Fenglope | 10 | 12 | 15 | 20 | |
| 101 | Jormuntide | 10 | 12 | 15 | 20 | |
| 108 | Paladius | 10 | 12 | 15 | 20 | |
| 109 | Necromus | 10 | 12 | 15 | 20 |
All mounts that do get a speed increase from upgrading their Partner Skill gain the exact same amount of speed.
There's been rumors that Direhowl is the only mount to receive a speed increase with Partner skill levels and/or that Direhowl receives a larger speed increase. Both of these rumors are untrue.
The first upgrade (going from Lv.1 to Lv.2) is the biggest increase, giving a substantial 10% increase, and is definitely worth prioritizing considering it only requires 4 duplicate Pals to upgrade it. Lv.3 (+2%) and Lv.4(+3%) give a negligible increase and Lv.5 gives a modest increase (+5%) compared to the previous levels. At Lv.5 the total speed increase is 20%.
Any mount that is NOT on this list does NOT get a speed increase at all. This was most likely done by the developers because the mounts that do not receive a speed increase have other Partner Skill bonuses that do get increased, such as their Active Skill, mounted logging/mining, or mounted damage boosts.
Keep in mind that the base movement speed of each mount differs, so just because a mount does not receive a speed increase from the Partner Skill upgrade does not mean the mount is slow or bad. For example, a Jetragon does not receive a movement speed increase with Partner Skill upgrades but it is still by far the fastest simply because its base movement speed is substantially higher.