I'm going by the official Nintendo HG/SS guide book. In the Pearl/Diamond/Platinum guide, Feraligatr's base stats were one point higher than Meganium's and Typhlosion's, but in the new guide, its stats are lower than the other two. These base stat changes go for basically every Pokemon that appears in HS and SS.
I guess I should have been more specific and not assumed everyone else also had the guidebooks, lol. Sorry about that.
But, yeah, they base stats are definitely different than the ones from Pearl/Diamond/Platinum. If you still don't understand what I am saying, I will explain it. In the Pearl/Diamond/Platinum guides, each Pokemon has a potential of 30 of what I will refer to as "statistic values" which are divided into six areas (HP, Attack, Defense, Sp. Attack, Sp. Defense, Speed), making each area have a potential max of 5 statistic values. (However, no Pokemon has 30 statistic values.) I detected the change in base statistic values in HG/SS in my new guidebook while planning a future team. The potential max for statistic values is now 36, which means each stat area (HP, Attack, etc.) now has a potential max of 6 statistic values.
What I stated about Feraligatr having lower overall stats than previously is correct if the above information is factored into the equation. (That was a figure of speech.) Feraligatr's base stats now total 20 (which were previously 18) compared to Meganium and Typhlosion's 22 (which were previously 17). Due to this new configuration, I had to restart my copy of HeartGold and choose Cydaquil, since there are stringer water types than Feraligatr.
I also questioned how trades among the DS games would work since there has been a stat change, and I'm not entirely sure. Either the traded Pokemon's stats would drop, or they would rise depending on which game they were traded to, but that is obvious, unless I am mistaken about all of this.
If I am wrong about this, don't blame me, blame the guidebook.