All of that can be found in the GitHub.
Here is a link to the start of the Challenge Mode teams. The levels are not accurate due to how the level scaling was implemented, so this will have to be combined with the levelScaling field of each Gym's/E4 room's map.json file to obtain the true level.
Here is the one for Pewter Gym. This will spoil the movesets and Pokemon additions for the Challenge Mode teams.
If you don't want spoilers for the teams themselves, the max levels are:
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I typoed one of the summary screen fixes and now all Pokemon, regardless of OT, appear to be traded on the summary screen. They will incorrectly print "Apparently met..." As this is not a high-priority fix and doesn't affect gameplay in any tangible way, I will wait until I have a more substantial update to fix it.
I've been giving some thought to making items like Metal Coat and King's Rock available earlier and I think I'm going to stick them as rare held items on wild Pokemon in Kanto. The only item that it wouldn't make sense to do that for is Up-Grade. Since Up-Grade is available in the Rocket Warehouse on Five Island, I think I may swap it with an item in Silph Co. like I did for the TM for Sludge Bomb. I may also make the DeepSeaScale and DeepSeaTooth available somewhere despite Clamperl not being available without trading because only one is obtainable per RSE save file.
There are a few other, minor adjustments I plan on making as well for the next update. Stay tuned.