554 to Lv14 before Cranidos
828 to Lv16 before Stunky
609 to Lv16 before Zubats
1363 to Lv19 before Forest

Onix Lv7 | 108 exp
Onix Lv9 | 138 exp
Geodude+machop guy | 220 exp | $320
First gym trainer | 171 exp | $176
Second gym trainer | 346 exp | $144
Machop guy | 127 exp |
Psyduck trainer | 136 exp |
Lass Shinx | 90 exp
Aroma Lady | 289 exp | $352
Grunt spinner | 150 exp | $520
Jacob | 456 exp | $224
Daniel | 514 exp | $384
Zachary | 282 exp
Nicholas | 324 exp | $448