Drewko, You need to know I have make the choice to put 3 gen of starter in the first grass for 1 reason : I know a lot of people make the hard choice when they pick their starter now they can take one and find the other easily
. After that you can choose your custom starter team cause I knox some person don't like starter from kanto (rare) and prefer starter from gen 2 for example.
But I understand, it's like "cheating" but if you don't like this I have post on the link of the ips all the tool so you can in 5 minutes change the pokemon of this first area.
Gen 4 ; 5 and 6 of starters are find step by step on your progression for information