1. In levels is probably referring to video game levels 2. Lot is a little tricky to explain, it is sort of like "what they will get from life." Stints means a period of time. 3. "Miss the vein" is probably referring to needle injections and how the needle doesn't always hit the vein. 4. It's a joke. They treat their Pokemon with care, but still make them fight each other (which is typically not what people do with their real pets.)