[BallGanda]

I bet the hack way to do it for all nades is

I am assuming that bots do not buy nades if bot_allow_grenades 0... which might not be the case.

in config:
bot_allow_grenades 1

plugin:
onroundstart
bot_allow_grenades 1
wait buytime
bot_allow_grenades 0
wait 20 seconds
bot_allow_grenades 1


If bots still buy nades with bot_allow_grenades 0

in config:
bot_allow_grenades 0

onroundstart
bot_allow_grenades 0
wait 20 seconds
bot_allow_grenades 1

but I am probably not one with the best idea.

To do the specific nade type would look at weapon restrict plugin sourcecode and get the specific code that does not allow the player/bot to equip the nade.