Type and moves notwithstanding, which is the most durable?
A. A Pokemon with 100 base HP and 50 base defenses
B. A Pokemon with 50 base HP and 100 defenses
C. A Pokemon with 75 HP and Defense
Not C, SpDef not mentioned
Think it's B
>>26402561
B is tankier.
>>26402561Base stats are altered to fit the OP
A:
0 Atk Mew Outrage vs. 0 HP / 0 Def Spinda: 149-176 (43.6 - 51.6%) -- 9.8% chance to 2HKO
0 SpA Mew Petal Dance vs. 0 HP / 0 SpD Spinda: 149-176 (43.6 - 51.6%) -- 9.8% chance to 2HKO
B:
0 Atk Mew Outrage vs. 0 HP / 0 Def Spinda: 86-102 (35.6 - 42.3%) -- guaranteed 3HKO
0 SpA Mew Petal Dance vs. 0 HP / 0 SpD Spinda: 86-102 (35.6 - 42.3%) -- guaranteed 3HKO
C:
0 Atk Mew Outrage vs. 0 HP / 0 Def Spinda: 109-129 (37.4 - 44.3%) -- guaranteed 3HKO
0 SpA Mew Petal Dance vs. 0 HP / 0 SpD Spinda: 109-129 (37.4 - 44.3%) -- guaranteed 3HKO
B is most durable, A is least durable, but B is only barely more durable than C.
>>26402561
Are we to account for EVs or just base stats?
>>26402561
Define durable
Let's just set these Pokemon at level 50, from an Attack stat of 75, with an attack that deals 70 damage.
A.
2 x 50 + 10 = 110
110/250 = 0.44
75/50 = 1.5
1.5 x 0.44 x 70 = 46.2 (pretty sure it rounds down all decimals)
46 + 2 = 48.
The Pokemon now has 52 HP, 52% of its original HP.
B.
2 x 50 + 10 = 110
110/250 = 0.44
75/100 = 0.75
0.75 x 0.44 x 70 = 23.1
23 + 2 = 25
The Pokemon now has 25 HP, 50% of its original HP.
C.
2 x 50 + 10 = 110
110/250 = 0.44
75/75 = 1
1 x 0.44 x 70 = 30.8
30 + 2 = 32.
The Pokemon now has 43 HP, 57.33% of its original HP.
In this very basic test, Pokemon C is the better defender. This is why types, abilities, and natures matter.