My favorite part of the New Pokemon cycle is when we get to see our first batch of common Pokemon. Generation IV was the first Generation I really followed the reveals of, and they went like this...
* Generation IV: Of course this was the last time we got multiple Pokemon revealed before the games were even properly announced really, but once we knew about Diamond and Pearl and saw our first screen, Drapion, Cherrim, and Pachirisu were the first group. We knew we were getting Baby/Evolutions due to Weavile, Mime Jr. and Bonsly already being known about, so a lot of people thought Drapion evolved from Gligar. It kind of illustrated how Generation IV would go, not too many completely new Pokemon. Drapion was the classic "big purply Pokemon" Gen IV was fond of, Cherrim was one the many gimmicky Grass or Bug Pokemon, and Pachirisu basically established the idea of a Pikachu clone since we only had Plusle and Minun before and that wasn't exactly a pattern. It's worth noting the Starters and Legendaries came later here. Yep, there were quite a few Pokemon known before them.
* Generation V: An absolute blow-out---we got Chillarmy, we got Klink, we got Sandile, we got Blitzle, we got Pidove, we got Munna, we got Darmanitan. I felt by this we were getting a lot of Pokemon, and a week or so later there was a new commercial that showed off even more Pokemon. Probably my favorite CoroCoro leak EVER. I would die if our first Sword and Shield mass Pokemon reveal matches this.
* Generation VI: Kind of the same deal as above, but on a lesser scale---Gogoat, Pancham, Helioptile (Mawile pre-evolution? lol), and Fletchling. Solid batch all things considered.
* Generation VII: Technically just Rockruff and Komala at first, but that was in CoroCoro which took a backseat---the official site updated with them around E3, which gave us Yungoos, Grubbin, and Pikipek. First time we got the early rodent, bug, and bird revealed all at once which was kind of cool.