I found a Java server running modded Cobblemon on 1.21.1 and it is built around the whole pokemon kind of vibe.
It sounds like a good place to meet new people and make friends since they say everyone is welcome.
The only hard rule they call out is you must be 18+ to play. They also want you to join their Discord to learn how to join the server.
GRM Pixelmon is a Pixelmon Reforged server running on Minecraft version 1.16.5. It offers a modded experience that focuses on the Pixelmon gameplay style. Every player receives a free rank, backpack, and access to pokeheal, giving a smoother start on the server. The world includes custom content such as a Johto region inspired by the classic Pokémon games. Players can explore a Safari Zone, take part in PokeHunt, and join regular events. There are also daily rewards and other features designed to keep players engaged over time.
The AZOTH Network is a long running community project focused on delivering a faithful yet unique Pixelmon MMO inspired by the classic monster catching games. In development in some form since 2011 and reshaped in 2020, it aims to combine the best elements of those games with Minecraft. The server offers a fully featured Pixelmon adventure map where you can travel through regions such as Kanto, Johto, Hoenn, Sinnoh, Unova, Kalos, Alola, Galar, and more, all woven together with areas from the unreleased Spaceworld Beta. You can experience an Origins style Gym scaling system that adjusts Gym Leader teams to your party strength and badge count, plus a Shadow monster storyline set in the Orre region. Custom NPCs provide tailored scripts for item storage, usable technique cases, game corner style minigames, and other interactive features. The project is run by an experienced staff team that focuses on fair, balanced gameplay with no pay to win elements, loot boxes, crates, gambling, or microtransactions of any kind.
PocketPixels offers unique and enjoyable Pixelmon adventures for everyone in the Pixelmon community, with custom content, regular events, and a one of a kind friendly community. Start your journey and enjoy an experience like no other. Challenge an 8 plus Gym System run by experienced staff to earn badges, or take on Hard Mode Gyms, the Elite Four, and the Battle Frontier for an extra challenge. Daily quests let you complete tasks for rewards and help you experience Pixelmon gameplay to its fullest. You will see constant custom content and network updates, staff actively improving your experience, and frequent giveaways and events with prizes. Whether you enjoy competitive battling, trading, catching Pixelmon, hunting legendaries, or just hanging out with friends, you can find your place on PocketPixels.