This is old technic. If you go to cmc and search shiba or doge, then You'll find some more altcoins whose names similar to shiba and doge. Pepe seems good memecoin in this year, cause after dump 50%, it again recovered and kind os stable by its price. The interesting matter is, some project already created hype by using pepe name and those are already trading on pankcakesawp although with very low trading volume
almost every coin could easily make trading pair in pancakeswap i don't think its that big of a deal honestly.
i'd be baffled seeing them listed in binance or some other centralized exchanges itself considering they need to undergo really thorough review.
most of the tokens listed in DEXs with the same name are fake. so you need to actually check the contract address before you trade. some are making it to CEXs because of the trading volume they have. just remember the SHIB, since binance saw the demand, they added it without application from their respective devs. at the end of the day, it is all business.