Here's a Doraemon encyclopedia listing every gadget that appeared

Doraemon Gadget Rush 1.4.2 Free Download

Instant Object Mobile (gadget), Doraemon Wiki

Gadgets of Doraemon - Doraemon Türkiye

2023 Doraemon Film Anime's Trailer Reveals New Cast Member, March 3 Opening - News - Anime News Network

Doraemon Encyclopedia, Doraemon Wiki

The Illustrated Encyclopedia of Real Things, Doraemon Wiki

Viz Opens English Doraemon Site with Dubbed Trailer - News - Anime News Network

Stand by Me Doraemon, Doraemon Wiki

Which gadget will you ask Doraemon? How will you use it? - Quora

List of gadgets, 2014 Doraemon Wiki

Which Doraemon gadget would you buy if you had a chance? - Quora