Mega Mewtwo X has the highest cited base Attack stat: 190. That is a species-and-form stat, not the final Attack number on an individual Pokémon’s status screen, which is affected by level, IVs, EVs, nature, and other effects.
A verified top ten cannot be established from the available ranking excerpt: it names nine leaders but does not show the complete cutoff or tie handling. Rather than invent a tenth entry or imply an exact order among ties, the table below gives the leading forms and their cited base Attack values.
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Leading Pokémon by base Attack
The values below are base Attack figures from Pokémon Database’s sortable Pokédex table, accessed in 2026. Mega Evolutions and alternate forms are listed separately where they have separate stat rows. These are the nine leading entries visible in the cited ranking excerpt, not a confirmed top-ten cutoff.
| Pokémon form | Base Attack |
|---|---|
| Mega Mewtwo X | 190 |
| Mega Heracross | 185 |
| Kartana | 181 |
| Deoxys (Attack Forme) | 180 |
| Mega Rayquaza | 180 |
| Primal Groudon | 180 |
| Black Kyurem | 170 |
| Mega Garchomp | 170 |
| Ultra Necrozma | 167 |
The cited ranking excerpt does not establish which entry belongs in tenth place or how the full table’s ties should be presented. The table therefore stops at the nine reported leaders instead of treating an unverified cutoff as definitive.
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What “highest Attack” means
Base Attack is a fixed stat assigned to a Pokémon species or form. It is useful for comparing their underlying physical-attack potential, but it is not the Attack value an individual reaches in play. A Pokémon’s displayed stat also depends on its level, individual values (IVs), effort values (EVs), nature, and applicable effects.
For example, Mega Mewtwo X’s 190 is its base Attack figure; it does not mean every Mega Mewtwo X has 190 Attack in battle. Mega Mewtwo Y is a distinct form, and Serebii’s Mewtwo reference identifies its standout stat as Special Attack rather than Mega Mewtwo X’s base 190 Attack.
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Why the ranking depends on form rules
A ranking that counts Mega Evolutions and alternate forms as separate rows will differ from one that includes only standard forms. The values shown here follow the separate-row approach used by the cited sortable table. They should not be read as a list of ten different species under a standard-form-only rule.
Base Attack alone also does not determine practical battle strength. Speed, typing, abilities, physical move options, and the rules of a particular game all affect how useful a Pokémon is; none changes the base Attack figure in this comparison.
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