! NOT OFFICIAL - A fan-made, unofficial tool from an independent developer. !

Built for the moments when opening a damage calc usually costs you the turn — especially in Pokémon Champions battles. Check damage, speed, spreads, and info in one wide desktop view, without scrambling between tabs. The name comes from aserazu, Japanese for "without panicking."

PC browser / Free / No install
aseraz damage calculation screen

No prep marathon required.

No capture card. No team setup first.
Open aseraz and start checking damage by hand. The extras help, but they are optional.

Switch teams, bring a laptop, or start from a clean slate.
aseraz still gives you a usable damage calc without turning prep into a chore.

Designed to make mid-battle calc feel less frantic.

Wide views, fast team entry, mouse-first controls, and saved targets all cut down the tiny delays that eat your timer.

See the whole calc without switching screens

Damage into common spreads, stat changes, status, remaining HP, items, your own spreads, and party management stay in one view.
Because aseraz is built for desktop, you spend less time switching screens and more time deciding.

Enter the opposing team super fast

During team preview, type a name, pick the suggestion, press Enter, and move straight to the next slot.
It is built for keyboard flow, because switching between typing and tapping is exactly what slows you down.

Use it one-handed mid-battle

Pick moves, switch spreads, change targets, and use search suggestions with just the mouse.
You do not need a perfectly prepared team sheet. Fill things in as the battle goes, then save the team later.

Previous results stay available

aseraz keeps data for each Pokemon on the opposing team, so switching targets does not mean starting over.
This is where the wider desktop layout really pays off.

Check abilities and base stats without leaving the calc

You can quickly check base stats, typings, and ability notes for the selected Pokemon.
No extra search box, no pile of tabs, just the information you wanted nearby. This is especially useful for checking base stats and abilities before and after Mega Evolution.

FAQ

FAQ

Where does the data come from?
Base data such as Pokémon names, forms, moves, and abilities comes from public sources like PokéAPI, @smogon/calc, and @pkmn/data / @pkmn/dex. Frequently used moves, items, and display ordering are curated by the developer for usability — not imported from external usage stats or rankings.
Is it free?
Yes. Feedback, bug reports, and sharing it on X are all very welcome.
Can I use it on my phone?
It is built for PC browsers. It may open on a phone, but it will not feel right.
Do I need a capture card?
No. Manual entry works fine, so you can use it as a regular damage calculator.
Does this work with Pokémon Champions?
Yes, that's exactly what it was built for. The original idea was to keep the Champions battle screen visible alongside aseraz on a desktop. It also works as a regular damage calculator for other current-gen battles — just enter the opposing Pokemon manually.
Does this work with Pokémon Showdown?
No, this is built for in-game battles like Pokémon Champions, not for Showdown.
If you play on Showdown, the Showdex extension is great and already does what you'd want.
Is this an official Pokemon tool?
No. It is a fan-made tool by an independent developer and is not affiliated with Nintendo, The Pokemon Company, Creatures Inc., or GAME FREAK inc.
No capture card? No problem

A capture card helps, but it is not required.

A capture card can make aseraz even nicer by keeping the game screen beside your calc. Less eye movement, less context switching. Recording, screenshots, and image recognition are there too, but manual entry still works fine if you do not feel like setting anything up.

✓ Show the remaining timer near your damage results✓ Read team preview and enter the opposing team faster✓ Reflect remaining HP for both sides

Give it a try.

Just open it in your browser.

aseraz.
// About the name
aseraz - don't panic.

Aserazu roughly means "without panicking" in Japanese. That is the whole idea: check damage and information mid-battle without losing your cool. Competitive battles have plenty of moments where one more second would lead to the right move. aseraz is for those moments.