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The "Sugimori Eyes" thing only really applies to the first 2 phases of Gen 1's designs, and mainly is seen in the first phase when Taijiri and Sugimori were the only people making designs.
In fact a bunch of these guys ended up retroarctively getting less "same-facey" when they stopped doing kaiju inspired designs. This was when types hadn't been really decided on yet, but even by Phase 2 the "Sugimori Eyes" were aleady becoming less common.