Ditto vs Mew

13 dimensions. One winner.

0.3 m

Ditto

0.4 m

Mew

1.7 m

You*

*if you are exactly 1.70 m. We checked.

2—12

Mew takes the crown 12–2.

3 ties

Ditto	Dimension	Mew
0.3 m	Height	0.4 m
4 kg	Weight	4 kg
148 kg/m³	Densityweight ÷ height³ — the "how is that physically possible" metric	62 kg/m³
48	HP	100
48	Attack	100
48	Defense	100
48	Sp. Attack	100
48	Sp. Defense	100
48	Speed	100
288	Base Stat Total	600
35	Catch Ratehigher = easier to catch	45
101	Base EXP Yield	270
20 cycles	Hatch Timelower = egg hatches faster	120 cycles
1	Moves Learned	375
1	Evolution Stages	1
Gen I	Debut Generationlower = debuted earlier	Gen I
70	Base Friendship	100
Genderless	Gender Ratio	Genderless

If they actually fought

Dittonormal

Mewpsychic

Even — both hit for 1× (best STAB multiplier)

Ditto

Mew