A set of two DLC packs were released for Sonic Frontiers exclusively in Japan. As far as I can tell, it doesn't seem like either of these are currently set to be released elsewhere, so for the time being modding is required to enable them.

Special thanks to HyperBE32, SuperSonic16, Cahloosh, MegAmi24, shin0_52, samesquad, ActualMandM, breakthetargets, and BSF for making this possible!


This DLC pack features:

• A new Korone-inspired Sonic outfit
  
• Korone sound effects for things such as boosting, using springs, collecting rings, using rainbow rings, popping balloons, and Koco voices.
  
• A new skin for Kocos based on "Koronesuki" (also known as Listener-san)

This DLC simply adds a new idle animation for Sonic that features him waving around and playing with a Koco plushie as if it were a football.

In order to install these mods, you will need to first download HedgeModManager. This is the mod manager commonly used for Hedgehog engine games on PC, including Sonic games.

The latest version can be found here:

Warning: the following link contains a download. Proceed at your own risk.
https://github.com/thesupersonic16/HedgeModManager/releases/

Once you download it, open it and switch to the "Settings" tab. At the bottom of this tab, you will find an option called "Update Channel". Switch this option from "Release" to "Development" in order to enable Sonic Frontiers compatibility








Once this is done, you are ready to download and install the mods.

The mod's page can be found here:

Warning: the following link contains a download. Proceed at your own risk.
https://archive.org/details/FrontiersJPDLC/

HedgeModManager has a feature that allows you to install mods through a simple link. You can install the mods by copy and pasting the following links into your browser:

Korone Collaboration
Warning: the following link contains a download. Proceed at your own risk.

hedgemm:/install/https://archive.org/download/FrontiersJPDLC/hmm_1click_dlcholo.json

Koco Emote
Warning: the following link contains a download. Proceed at your own risk.

hedgemm:/install/https://archive.org/download/FrontiersJPDLC/hmm_1click_dlcslr.json

Once they are downloaded and installed through HedgeModManager, enable them, and hit "Save and Play".

CURRENT VERSIONS:
Korone DLC: 1.20
Koco DLC: 1.10

NOTE: If you downloaded the mod prior to December 13th, you should manually download it again to make use of PS4 assets and automatic updates.

In the event that a game update occurs, the mod will most likely break. Fortunately, mod updates occur fairly quickly after every game update. I will keep everyone updated on any updates.

Once you launch the game, enter the Extras menu and you are given the option to enable and/or disable specific parts of the mod.

Once you enable these, you are set!

Once again, special thanks to HyperBE32, SuperSonic16, Cahloosh, MegAmi24, shin0_52, samesquad, ActualMandM, breakthetargets, and BSF for making this possible!

Hope this guide helped! Feel free to ask any questions!