Stats

Although official information about stats can be found on the corresponding Bulbapedia article, several changes to stats have been made in Generation Omega. These changes are listed below.

Two new stats (well, one new stat and one existing variable turned into a stat): Critical and Determination. Critical is fundamentally unchanged from how it was back in Generation 6, but moves that raise Critical, including Focus Energy, now stack, just as Critical-raising items do (more on that later). Determination is a completely new stat. Like Critical, its effects are maximized at 4 stages. Although Determination does several things at once, they are either low-impact or have a low chance of working (some of these are identical to ones from Pokémon Refresh):

Each stage of Determination raises the critical rate by 1/32, which additively stacks with the critical rate from the Critical stat (max of 1/8, i.e., 1 Critical stage [assuming 0 Critical; ratios of this compared to a Critical stage are different with 1 or more stages]).

It also gives a Pokémon a chance to hang on to an attack that would otherwise faint it with 1 HP (1/40 per stage; max of 1/10, i.e., Focus Band).

In addition, a Pokémon has a chance to shed its status conditions. Each stage increases this chance by 3/40 (max of 3/10, i.e., Shed Skin). However, unlike Shed Skin, this affects all negative statuses, including volatile ones such as flinching, confusion, curses, and binding moves.

An increased Determination stat can also raise Evasion, by 1/12 per stage (max of 1/3, i.e., 1 stage of Evasion). Additively stacking with Evasion stat increases.

Finally, as the only Determination function that is unique to Generation Omega, each stage of Determination raises the chance of a Hysterical Move by 2.5% (max of 10%). This additively stacks with other boosts to Hysterical Move chance as well as the 5% base.

Critical and Determination are also raised by omniboosts (such as those granted by Ancient Power, Silver Wind, etc.), by 1 each. However, a certain omniboost raises Determination by 2, that being the DT Aura. It is triggered by a Pokémon or its Trainer being very nervous or in a pivotal battle/moment, due to their intense focus, as an ultimate resort. Extreme Evostrike and Extreme Litmustrike (Evostrike's Minus World counterpart) also do the same with their omniboosts.

In addition, a change was made to the accuracy/evasion formula: Speed became a factor in accuracy and evasion (current Speed, not base Speed).

The first calculation made to the Accuracy rate is to add (User's Speed/15) - (Target's Speed/15) to it. This can go negative if the user is slower, lowering accuracy, but can be positive if the user is faster, raising accuracy. Therefore, even if a move has 100% accuracy the opponent's Speed can make it miss. However, paralyzed Pokémon have their appropriate value set to 0, making paralysis and paralysis immunity much stronger. (Moves with infinite accuracy are unaffected.)