Gen 6 Catch Rate Guide
A catch attempt is a small physics style probability problem. The ball does not only depend on luck. It uses health, species catch value, ball power, status, terrain, and O-Power. This calculator turns those parts into clear odds. It is useful for planning captures in X, Y, Omega Ruby, and Alpha Sapphire.
Why health changes the result
Lower health gives the largest normal gain. The formula compares maximum HP with current HP. Full health gives a weak value. One HP gives a much stronger value. This is why False Swipe is so helpful. It places the target at one HP without fainting it.
Ball and status choices
Ball bonuses are multipliers. A normal ball has a value of one. Better conditions raise that value. A Quick Ball can be strong on turn one. A Dusk Ball helps at night or in caves. Status also matters. Sleep and freeze are strongest. Paralysis, poison, and burn are weaker, but still useful.
Critical capture estimate
Gen 6 can produce critical captures. The ball whistles, shakes once, and then decides. The chance depends on the final catch value and your caught Pokédex count. More registered species can raise this bonus. The calculator blends normal and critical outcomes to estimate the total success chance for one throw.
Reading the output
The modified catch value shows the main score before shake checks. The capped value is limited for the final test. The shake value shows the chance for one successful shake check. Four successful shake checks mean a normal capture. One successful check can finish a critical capture. The expected throws value is an average. Real battles can still be lucky or unlucky.
Best practical workflow
First, enter the target HP numbers. Then add the species catch rate. Select the most accurate ball bonus. Add status and O-Power only when active. Use the custom ball field when a special ball condition applies. Press calculate, then save the record as CSV or PDF. Compare several rows before choosing your final strategy. Keep notes for rare targets, long hunts, and repeat tests. Small input changes can move the odds a lot, so review each field fully before trusting the result in real battles.