
Well! I’m certainly glad that everything worked out in the end. It’s great to hear that your uncle is so supportive of you and that your pokémon get along rather swimmingly.
Regarding your question concerning your turtwig, generally speaking, if it’s not a good plant for you to eat, it wouldn’t be a good one for your turtwig to eat. That having been said, among the most common houseplants or garden plants that aren’t good for your turtwig: daffodils, buttercups, holly, poinsettia, primrose, tomatoes (the fruit is fine, however—just remove the leaves and stems), ivy, hyacinth, yew, bird of paradise, bamboo, rhododendron, azalea, periwinkle, and elephant’s ear. Also, do not feed your turtwig bulbs, dry seeds (softer ones in fruits are fine), or pits, and avocado, onion, and potato are likewise dangerous. On the other hand, ferns and aquatic plants are strangely okay, so it may be worth it to try buying the sorts of plants sold in the same shops that sell pet magikarp or goldeen.
Best of luck!