The best alternatives to Squid Maze Challenge are Electronic Arts, Recruit GG, and Electa.bz. If these 3 options don't work for you, we've listed a few more alternatives below.
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Blaze— Create beautiful 1-click content in your brand style with AI
Electa.bz a Pokémon squad builder built to support the Ultra Sun and Ultra Moon games launching today (November 17th!). It's leveraged by PokéAPI and exists as a responsive web app for now. V1 supports items, moves, natures and abilities, and links to Serebii.net to help you build your squad.