The following is a short guide on how to write the Base Stats of a Pokemon evolution. I decided to post it as it is independent of any process the EVO project would have. --------------------------------------------------------- Rules to evolve a Pokemon The following are the rules that an evolution to an existing Pokemon must adhere to: The Base Stat Total of the evolution cannot exceed 540. The only exception to this rule is when the Pokemon to be evolved already has a Base Stat Total that is greater than 540. In that case, the Base Stat Total of the evolution cannot exceed 555. Each base stat of the evolution except for Speed must be at least equal to the corresponding stat of its immediate pre-evo. The Base Stat Total of the evolution must be at least equal to the Base Stat Total of its immediate pre-evo. The evolution must not have the same six base stats as its immediate pre-evo. Notice that the above never mention the bias of the Pokemon (whether it is offensive/defensive or whether it is physical/special), which could imply that these can change. In fact, they can change. Here are some examples: Magneton's Base Stats are 50/60/95/120/70/70. It has an ODB of 20.5 (offensive) and a PSB of -18.4 (special). The Base Stats of its evolution, Magnezone, are 70/70/115/130/90/60. It has an ODB of 1.7 (balanced) and a PSB of -15.9 (special). So Magnezone turned from offensive to equally offensive and defensive when it evolved. Electabuzz's Base Stats are 65/83/57/95/85/105. It has an ODB of 20.4 (offensive) and a PSB of -24.9 (special). Electivire's Base Stats are 75/123/67/95/85/95. It has an ODB of 27.5 (offensive) and a PSB of 3.8 (balanced). So Electivire turned from special-based to equally physical and special when it evolved. Nosepass's Base Stats are 30/45/135/45/90/30. It has an ODB of -40.2 (defensive) and a PSB of 19.2 (physical). Probopass' Base Stats are 60/55/145/75/150/40. It has an ODB of -38.6 (defensive) and a PSB of -13.2 (special). So Probopass turned from being physical-based to being special-based when it evolved. Piloswine's Base Stats are 100/100/80/60/60/50. It has an ODB of -8.4 (slightly defensive) and a PSB of 33.1 (physical). Mamoswine's Base Stats are 110/130/80/70/60/80. It has an ODB of 14.5 (offensive) and a PSB of 43.4 (physical). So Mamoswine turned from being slightly defensive to offensive when it evolved. 5) Seadra's Base Stats are 55/65/95/95/45/85. It has an ODB of 12.4 (offensive) and a PSB of 13.5 (physical). Kingdra's Base Stats are 75/95/95/95/95/85. It has an ODB of 4.4 (equally offensive and defensive) and a PSB of 0.0 (equally physical and special). So Kingdra turned from being offensive and physical to being balanced when it evolved. The fact that 5 examples could be produced (there are even more) where the offensive/defensive bias and the physical/special bias were changed during evolution clearly shows that they are not a factor to consider when writing an evolution's Base Stats. Also note that all of the examples above are of Pokemon that evolved in later generations than their pre-evos. This gives us much more freedom to provide the base stats for our new evolution Pokemon. An example Evolution In the following example, we evolve Chimecho in four different ways. Chimecho's Base Stats are 65/50/70/95/80/65. Its BST is 425. Evolution 1: 75/70/90/115/100/75. HP: +10, Atk: +20, Def: +20, SpA: +20, SpD: +20, Spe: +10. BST: 525. Evolution 2: 65/60/80/125/125/70. HP: +-0, Atk: +10, Def: +10, SpA: +30, SpD: +45, Spe: +5. BST: 525. Evolution 3: 80/85/95/100/85/80. HP: +15, Atk: +35, Def: +25, SpA: +5, SpD: +5, Spe: +15. BST: 525. Evolution 4: 85/90/105/105/90/50. HP: +20, Atk: +40, Def: +35, SpA: +10, SpD: +10, Spe: -15. BST: 525. All of the above Base Stats follow the four rules mentioned at the start of the previous section, and hence they would all be allowed.