Pokemon Uranium Post Game Guide: Legendaries, Sidequests, and Champion Content

What Actually Unlocks After the Credits Roll

Beating the Tandor Championship is not the finish line in Pokémon Uranium — it is the starting gun for the most open-ended stretch of the game. The Pokemon Uranium post game hands you a huge pile of unfinished business: legendary encounters, leftover Mega Stones, hidden sidequests, and a second run at the Championship itself. If you closed the game right after the Hall of Fame, you have left a large slice of content untouched.

So what changes the moment the credits stop rolling? You reappear in Moki Town at your own house. Downstairs, a letter from Tsukinami Village sits on the table — community reports note that the "Letter from Tsukinami" quest has not been implemented in the current release, so don't sit around waiting for it to trigger. The real reward is next door: visit Theo's house and you will receive HM07 (Waterfall). That single HM unlocks several late-game areas that were previously out of reach, including optional items and evolution stones in Lanthanite Cave.

It also helps to understand what you're playing. Pokémon Uranium is a long-running fan-made tribute to the mainline series, documented in detail on the Wikipedia page for the Pokémon Uranium fan game, and its endgame content is built around exploration rather than a single final boss.

Legendary Pokémon and Rare Encounters in the Pokemon Uranium Post Game

The headline attractions are Actan and Lanthan, the two legendary Pokémon tied to Tandor's story. Actan — corrupted by CURIE and Urayne during the Championship — returns to its lair after the credits, and Lanthan waits deep inside Lanthanite Cave on Route 16. Both are the kind of hunt that rewards preparation: bring Heavy Balls, status moves, and a False Swipe user.

One caution from player experience: in version 1.0.1, Nuclear Actan was catchable during the story, but the capture was not saved to the PC afterward. Treat any story-timeline Actan as a curiosity, not a keeper, and save before you commit Poké Balls to it.

A few other encounters are easy to miss entirely and are worth sweeping up while you're traveling:

• S51 — visit Ripley's House on Route 8 at night, listen to the crop-circle story, and investigate the fields. If it isn't night in-game, you can close the game, set your computer clock to night, and restart.
• Hazma — catch one while you are inside Nuclear Plant Zeta. Back at the Bealbeach Ranger HQ, the Hazma is used to calm feral Nuclear Pokémon, making captured ones docile and willing to follow orders.
• Route 13 exclusives — wild Eevee, Spritzee, and Jackdeary only appear here, and Duplicat (Uranium's answer to Ditto) is essential for serious breeding.

Mega Stones: The Real Backbone of the Pokemon Uranium Post Game

Mega Evolution arrives at the seventh gym in Snowbank Town. After you clear Vaeryn's trials, Theo hands over the Mega Bracelet, plus one free Mega Stone for an eligible Pokémon in your party. From that point on, Mega Evolution can be used once per battle — but an unlimited number of times across your playthrough, so there is no resource to hoard.

The Pokemon Uranium post game is largely about finishing that collection. Several stones sit in optional corners of caves you may have rushed past, and a couple are locked behind HMs you only pick up late.

Practical tip: while you are inside The Labyrinth, Surf north from the entrance for the Life Orb, then Surf west into the side room for the Baariettite. It saves a second trip through a cave that is genuinely annoying to navigate.

Sidequests Worth Finishing in the Pokemon Uranium Post Game

Sidequests are where most of the post-game hours disappear, and a few of them have real mechanical payoffs rather than just flavor text.

• Sleeping Girl (Venesi City) — the biggest addition in recent Uranium updates. It only begins if you first speak to Fennel in the Tsukinami Village hotel. Be warned: your first run through the Dream World is done with a single Pokémon and no Poké Balls. Once finished, you can return to the Dream World any time by talking to Fennel again, and it is the only place to find certain Nuclear forms.
• Ninja Reunion (Tsukinami Village dojo) — complete it and the dojo becomes an unlimited battle arena for EV training, EXP, and cash.
• Fossil Sidequest (Route 5) — the fossil cave on the beach needs Strength to enter. The Gold Fossil inside The Labyrinth additionally requires Dive, so grab it after HM08.
• Crying Boy (Kevlar Town) — push the boulders on the far left of the Pokémon Center once you have Strength.
• Ripley's House (Route 8) — the crop-circle investigation that rewards S51.

Endgame Training, Money, and the Championship Rematch

Once the story is done, your remaining goals usually come down to three things: leveling a competitive team, funding the Poké Ball habit, and beating the Championship a second time.

The rematch works differently than a standard Pokémon League. You draw opponents from a pool containing the first seven gym leaders you defeated plus three other trainers. Beat four of them and the Championship Match begins. On the second run, Theo is your opponent instead of the corrupted Actan, which makes it a fair — and genuinely difficult — final test.

For training, a few spots stand out:

Two details are easy to overlook. First, withdrawing a Pokémon from the Daycare costs $100 for every level it gained, so plan long stays carefully. Second, the Tinkerer in Legen Town keeps handing out HM substitutes — the Boxing Gloves, the Surfboard, and the Power Glove — which free up party slots and move slots you would otherwise burn on Rock Smash, Surf, and Strength. Stop by after each gym and again after the Championship.

Finally, if you want cheap healing, the Lava Cookie stand in Tsukinami Village sells effectively discounted Full Heals, and the Heavy Balls sold nearby make catching large legendary Pokémon far less painful. And if you somehow skipped it, the Amulet Coin from the woman beside the Owten in Bealbeach City's park doubles your battle earnings.

FAQ

Is there a Pokemon Uranium post game? Yes. After you become Tandor Champion, you can hunt the legendaries Actan and Lanthan, finish Mega Stone collection, complete sidequests like Sleeping Girl and Ninja Reunion, grind EVs at the Tsukinami dojo, and re-challenge the Championship for a second run.

How do I get HM07 Waterfall after beating the game? Once the credits finish and you reappear in Moki Town, head to Theo's house. You will receive HM07 (Waterfall), which opens up waterfalls and optional cave areas such as the one holding Lanthan.

Can I rematch the Pokémon Championship? Yes. Return to the Championship Site past Victory Road. Opponents are drawn from a pool of the first seven gym leaders plus three other trainers; win four battles to trigger the Championship Match, where Theo awaits on repeat runs.

How do I unlock Mega Evolution? Clear the Snowbank Town Gym and its five trials. Vaeryn awards the Mega Bracelet plus one free Mega Stone for an eligible party Pokémon. Mega Evolution is usable once per battle but unlimited across your save file, so you can use it in every major fight afterward.