Cobblemon: Quartet (formerly Trifecta) is a modpack built around the mod Cobblemon, with an emphasis on improving four main aspects of Minecraft.

Exploration & Liveliness:

This modpack expands the world with improved world generation through mods like Regions Unexplored, which adds 70+ new biomes, LUMINOUS: NETHER, which adds new mobs and bosses, and Enderscape, which overhauls the End, making it feel fresh and fleshed out. Also, because of End Remastered, players are encouraged to explore every facet of the Minecraft world to reach the End. The world also feels much more alive and lived in through mods like Better Archeology, Friends & Foes, and Creeper/Enderman Overhaul, adding more depth to the life that currently exists in Minecraft.

Performance & Quality of Life:

Quartet vastly improves performance and optimization over the base game through mods such as FerriteCore, Embeddium, and ModernFix. It also adds useful information mods like BetterF3 and Xaero's Minimap, and utility/QOL mods like Carry On, Bridging Mod, Vein Mining, and Screenshot Viewer.

Creativity & Expression:

This modpack gives players extensive creative freedom through building and decoration mods like Chipped and Supplementaries, character and item customization mods like Figura <3 and Transmog, and various other ways to express yourself, such as Just Blahaj, Immersive Melodies, and Maxwell the Placeable Cat :3.

Multiplayer & Shared Play:

Quartet is heavily designed with multiplayer in mind, with mods that enhance the multiplayer experience, such as What Are They Up To, to see what your friends are doing, Camerapture, to create and save memories together in-game, and Snatched, to utterly mess with others >:3. Additionally, aforementioned mods like Figura and Carry On make the social experience all the more enjoyable!

While this modpack is primarily designed to be played with others, it can still be thoroughly enjoyed solo.

Things to Keep in Mind:

This modpack includes some config files that have been pre-edited, though feel free to change things to better fit your taste. :)
In the most recent version of this modpack (v3.x.x), these are the mods/files that come pre-configured in some way:

cobblemon (folder)
cobblemonsizevariations (folder)
justzoom (folder)
rustlingspots (folder)
unchained (folder)

cobbled_counter.json
cobblemon_smartphone.json
creeperoverhaul.jsonc
crepperoverhaul-client.jsonc
do_a_barrel_roll-client.json
easymagic-server.toml
enchdesc.json
EnderStorage.cfg
fastleafdecay-server.toml
fightorflight.json5
forgivingvoid-common.toml
friendsandfoes.json
snowballsfreezemobs.json5
someassemblyrequired-server.toml
soulbound-common.toml
spawn_notification.json
stackable_stew_and_soup.toml
swordblockingmechanics-server.toml
utilitarian-common.toml
veinmining-client.toml
veinmining-server.toml
waystones-common.toml
xaerominimap_entities.json

(Note: Version 3.x.x of this modpack was made with a couple extra mods/datapacks in mind that are not natively available on CurseForge. It's HIGHLY recommended that you download these for a better experience.

Here they are:

Beans Backpacks (Mod)
Navas' ZAmega (Mod)
Cobblemon No Waystones (Datapack)
Vivillon Pride Patterns (Datapack)

These extras are technically optional, but I recommend using them :3)

(Note if playing v1.0 or v1.1: When spawning at the Central End Island with End's Phantasm installed, the player will clip through the obsidian platform and die if over the void. I recommend temporarily entering creative mode just before entering the End to prevent this, then switching back after saving yourself and/or adjusting the platform.)

Cobblemon; Trifecta