Thank you for the digits Rick!
But it was enough the first digit (the experience needed from Lvl.1 to Lvl.2)
The other digits are calculated on a universal formula for all pets:
Exp = x*L(4L+5)
where
x - individual coefficient (different for different pets),
L = pet level
- 1 (due to the fact that the starting lvl is 1, not 0),
Exp - amount of experience needed to level L.
Knowing the number of experience (Exp) immediately after raising a pet to any level (Lv), individual coefficient x is calculated by the following formula:
x = Exp/(Lv-1)*(4(Lv-1)+5)
For the first digit (reaching Lvl.2), the formula simplifies to
x=Exp/9
So for Royal Chirin x=324/9=
36.
Substitute in the formula for the level 25:
Exp(25)=36*24(4*24+5)=
87264