I tried it yesterday morning, got the same issue; the character that would level-up froze before the battle started. Tried again this morning, intending to show screenies, and it worked. I did everything exactly the same as before, except this time I made all the boosts 64 (100) instead of A0 (160), so maybe there’s some kind of cap? I don’t really know. Maybe your pointer isn’t in free space? According to this you should try something between 0x00B2A610 to 0x00C00000. I personally did 0x8B30000.