Launches, improvements, corrections, and PvP data changes that directly affect what you can do on Oak.
September 2026
New
Site updates now have a home
Oak now keeps a public record of the launches, improvements, corrections, and PvP data changes that affect how you use the site. Use the month and year controls above to find an earlier update.
Affects: Everyone using Oak Coliseum
PvP Data
Twilight Trails league data is live
Oak's active league menus now use the Twilight Trails rankings and matchup releases selected for the current season. League selectors show the active formats without adding season labels to every choice.
Affects: Optimizer, Customizer, Simulation, Training, and What-If Analysis
Improved
Your Pokémon builds now follow one shared rulebook
Oak now carries the same form, status, CP, level, IVs, moves, league, and season information between its major tools. Missing IVs stay unknown, special moves remain distinct, and league eligibility is evaluated consistently.
Affects: Inventory, Optimizer, Customizer, Simulation, and What-If Analysis
Fixed
Mega League recommendations now obey both team limits
We corrected two recommendation errors: Oak could include a Mega or Primal above the selected league's CP limit, and it could place more than one Mega or Primal on the same team. Oak now enforces both rules across every Mega League format. Your saved Inventory was not changed.
What to do: Regenerate any Mega League team created before September 7.
Affects: Optimizer, Customizer, and Simulation
New
Add Pokémon from appraisal screenshots
Inventory can now read one or two Pokémon GO appraisal screenshots on your device. You review the detected Pokémon, CP, IVs, form, status, and moves before anything is saved. The screenshot itself is not uploaded to Oak.
Affects: Inventory and Screenshot Import
Fixed
Mega and Primal build candidates follow the complete evolution path
Training can now recognize when an owned Pokémon can evolve and then Mega Evolve or undergo Primal Reversion for an eligible league. It still rejects Shadow Pokémon, ordinary leagues, and builds that would cross the league's CP limit.
Affects: Training build candidates
August 2026
Improved
Mega, Primal, and event move choices were expanded
Oak filled the complete base move pools for supported Mega Evolutions and Primal Reversions, added newly released Mega forms, and restored missing Community Day moves for Thievul and Oinkologne. Oak now checks its move catalog against current PvPoke battle data each day and sends questionable changes for review instead of removing moves automatically.
Affects: Inventory, Training, and team tools
Improved
Inventory entry choices are easier to scan
Inventory now presents Poke Genie import, Pokebattler import status, and manual entry as three clear choices. Poke Genie and manual entry are available now; Pokebattler remains labeled Coming Soon until that import is supported.
Affects: Inventory
New
What-If Analysis lets you test a build before changing it
Choose a saved Pokémon, try another legal moveset, and compare exact 2–2 shield results against the league's tracked threats. The experiment is read-only and never changes the Pokémon stored in your Inventory.
Affects: Workshop and Inventory
Improved
Inventory now limits forms and moves to compatible choices
The editor now offers catalog-backed forms instead of a free-text field and refreshes the legal move list when the Pokémon, form, or status changes. Existing records with older form labels are resolved without guessing when the evidence is ambiguous.
Affects: Inventory editing
Improved
Large Poke Genie imports are faster and duplicate-safe
Large roster imports now save as one protected operation while league ranks finish separately. Reimporting the same Poke Genie records skips those records without incorrectly merging different Pokémon that happen to share CP, IVs, and moves. Inventory can also be cleared through an intentional confirmation step.
Affects: Inventory CSV import
New
Monthly and annual Premium membership opened
Signed-in users can now choose monthly or annual Premium membership through Stripe-hosted Checkout and manage an active paid subscription from their Oak account.
Affects: Premium and My Account
New
The GO Battle League schedule joined Oak
The public Schedule page shows current and upcoming league rotations, Stardust bonuses, and direct paths into Oak's tools, with links to official and community calendar sources.
Affects: Schedule
Improved
Training now focuses on improvements you can actually make
Training now evaluates eligible Pokémon from your own Inventory, omits builds whose moves already match the recommendation, and explains move changes, second Charged Attack needs, Elite TM requirements, Frustration, and Return without editing your saved Pokémon.
Affects: Training and Inventory
Improved
Team recommendations gained matchup evidence
Optimizer recommendations now use role-aware performance and the tracked meta while maintaining broader species variety across ABC, ABB, and ABA results. Premium analysis shows Win, Close, and Loss outcomes, shared weaknesses, best answers, and type and coverage gaps for the generated teams.
Affects: Optimizer and Premium team analysis
Fixed
Generated teams now enforce Species Clause
Oak no longer recommends two forms or statuses of the same Pokémon on one team. Standard, Shadow, Purified, regional, costume, and other variants now count as the same species when a lineup is built.