I trawled b4k archive to compile every (audio) MP4 the Chronicles fangame guy posted ever since he started on February 17 of this year. Did this because since he's keeping a cryptic routine + I wanna have a quick "what is this" screenshot for those out of the loop:
anonpaste.com/share/sonic-chronicles-fangame-clips-f8245dfd24

Also wrote all he's sporadically said about it:

Concept
>RPG based on Sonic Chronicles & Sonic the Fighters. 104 characters. May add more, but not now.
>Characters use Dreamcast-era voices except the Chaotix, who use 4kids-era voices. There are alternate character versions with their 4kids voice. Silver's replaced with Marty McFly. Manic uses any Jaleel White lines from the DiC cartoons, Sonia's voice is replaced. Other voices are taken from various games (ex. Injustice Catwoman as Fiona).
Gameplay
>Barriers (from StF) can be used for extra turns, but make a character weaker if all lost. They recharge ala Bravely Default.
>Element system, but affinities are character-specific, not element-assigned. Blaze isn't water-weak but resists fire for example.
>[specials are via] POW meter similar to Chronicles, but can't be refilled by any kind of restoring item nor increases on level up; it's just the moves you get. [...] There are teammates who can refill like Sage, and hyper forms can refill. Debug mode can force refill, but besides that it can't be refilled normally. Certain moves like Chaos Blast erase it entirely.
Setting:
>Earth. No counterparts. Human NPCs primary (SA1 models for NPCs). Game & Movie locations. No comic locales. Pic related are some notes. Most recordings are in Central City & Reno. Story is nothing special, but won't say.
Dev team/Website?
>Just 1 guy. And no. Keeping the game's name secret (not a big one or anything, just want to keep it decently irrelevant until release is ready).
Status
>Bugfixes. Camera/Particle editing. Every character/animation is complete as is the battle system, dialogue system, cutscene setup etc