Hello :)
I'll try to explain my problem because i speak french haha

So , i play in Singleplayer with some other mods
(Minecraft 1.10.2 (lol)
Alternate-Terrain-Generation-Mod-1.10.2
AmbientSounds v1.2.1 mc1.10.2
backpack-3.0.1-1.10.2
BetterFoliage-MC1.10.2-2.1.2
CoralReef-1.10.2
davincisvessels-1.10.2-0005-full
DynamicLights-1.10.2
DynamicSurroundings-1.10.2-3.4.0.0
ediblebugs-MC1.10.02_EB1.4.6.2099
EnhancedVisuals v1.0.12 mc1.9-1.10
mobends-0.22.5_for_MC-1.10.2
Mobtotems-1.10.2
MrCrayFishs-Furniture-1.10.2
Parachute-Mod-1.10.2
Pixelmon-1.10.2-5.0.4-universal
Pixelmon-Armors-1.10.2
RealisticTorches-1.10.2-1.6.4
SleepingBag-1.10.2-1.3.0
SensorCraft-1.10.2
SoundFilters-0.9_for_1.9.4
ToughAsNails-1.9.4-1.0.11
TreeChopper-1.10.2-1.1.1a
UnderwaterUtilities-1.10.2-1.1.2 + NEI and his core)

I played a few hours without any problems until i've changed the setting for the spawning. It continue to work fine a couple minutes after the change and POUF finally there wasn't a single pokemon (except those who spawn with spawner) spawning !
The first time the problem resolves himself after i changed almost all the setting for spawning, and i didn't how i do that haha

And now, without any changes in setting, the pokemon won't spawn again and i didn't find any solution :O

I hope you understand hahaha

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