GBL IV Optimization Basics

Many beginners assume a 15/15/15 'hundo' is best, but in CP-capped GBL a Pokémon with a low Attack IV is often the stronger one. Here's why.

CP caps and the stat product

CP is a single number combining Attack, Defense, and HP. Within the same CP ceiling (say, 1500 in the Great League), a lower Attack IV lets you push the level higher while keeping Defense and HP up. The result: Attack is slightly lower, but the product of all your stats (the stat product) is larger, so you last longer and gain an edge in the shield battle.

So low Attack wins out

In the Great and Ultra Leagues, players usually hunt for a Pokémon with low Attack but high Defense and HP — the so-called 'rank 1 PvP IV.' Check your caught Pokémon with a ranking app or the in-game PvP IV display, and pick the Defense- and HP-heavy ones.

The Master League is the opposite

In the uncapped Master League, maxing out stats is what pays off, so a Pokémon with high IVs — Attack included — and a high level (plus XL Candy) is the strong one. Remember that the ideal IV direction is exactly the opposite depending on the league.

Summary

Great/Ultra = high Defense and HP (low Attack) spreads; Master = high across the board plus high level. Let the tier list and live pick rates set your priorities for which Pokémon to build, and you'll waste less Candy and Stardust.