i believe you're thinking leopard geckos! crested geckos basically eat fruit smoothies (Crested Gecko Diet formula)! you can offer them roaches on occasion tho, but they do not require them for a healthy and balanced diet in captivity. here's a video of my guy eating some fresh Pangea CGD: https://streamable.com/wbs3f
oh man, I had no idea about the crested gecko diet. do you have to treat geckos the same as new snakes when you introduce them into the house (quarantine)? your cresty is really adorable!!