My 2 cents (U.S, so not too valuable) on the topic:
Merchandise is necessary and honestly when I first was shopping for Pokitto I was curious why there wasn’t anything like that. I’d love a coffee mug with Pokitto related art on it to bring to the office! Or two so I can also have one at home.
I absolutely love and agree with the concept of selling physical sd cards preloaded with a game on it and accompanied with a small booklet and box case. I too have fondest of memories reading the booklets before getting home to play.
An official carrying case would make me so happy. I always worry about packing my little Pokitto for trips.
Hats and hardware are always on my radar. I’m starting to experiment with my own sensor kits too. I’d definitely pay for a “hat developer kit” with a few sensors and a small guide to get started.
Ok, top of my list and something I gaurantee I’d buy: hat developer kit. As previously mentioned something with a few sensors and wires and random electronics (similar to the elegoo arduino kits) and a starter booklet (or a place online?) would easily peak my interest. Could even sell a kit version which includes a Pokitto :o… Since for me, the pex and extendable hardware is what sold me on Pokitto.
Edit: I don’t have an ir emitter. If a kit had one of those I’d be even more than 100% guarantee to buy it.