Evil Grimace is a hybrid cannabis strain that is believed to be a cross between two popular strains, Purple Urkle and Willie's Wonder. Unfortunately, there isn't much reliable information available about the exact THC levels or indica/sativa ratio of Evil Grimace, as it is a relatively uncommon and obscure strain.
 
That being said, based on its parent strains, Evil Grimace is likely to have a moderately high THC content, possibly ranging from around 18% to 25%. In terms of its indica/sativa ratio, it's likely to be an indica-dominant hybrid, possibly with a ratio of around 70/30 or 80/20.
 
As with any cannabis strain, the specific effects of Evil Grimace can vary depending on factors such as dosage, method of consumption, and individual tolerance. It's important to start with a low dose and gradually increase as needed to avoid overconsumption and potential adverse effects.