What gave you that impression though? I think the franchise does modestly, but doesn't move copies as well as Sonic. The character just isn't as iconic or popular.
I'm aware that vgchartz isn't 100% accurate but there really isn't an alternative. Apart from hearing what titles are in the top 40, or barring official fiscal results postings, companies are pretty hush hush about how many units they actually sell.
And I'm looking to compare franchises more than I am looking for accurate numbers. As long as VGchartz is somehow equally adjusting sales for all games, it should still hold weight as some kind of legitimate comparison. That's a big if though.
Honestly, it's mostly because Ratchet and Clank has endured as a franchise, in spite of the absence (relative or absolute) of Spyro, Jak, and Crash, Sly Cooper's hiatus and revival notwithstanding. Also, in spite of the decline in colorful protag platformers (
Klonoa). Though this, not without spinoffs and apparently some gameplay focal point changes, which I suppose is relevant in a discussion about 3d platformers. As mentioned the PS2 titles got the Greatest hits labeling, and the original trilogy got a compilation too.
I heard about the movie when it was first announced. The couple of articles that I have seen accompanying that movie's announcement cite a 25 million worldwide sales figure, which I've only ended up tracing to an interview with Insomniac dating a few years back and self-disclosing that figure. That number, though necessarily dated at this point in time, is still often cited, so it's perhaps just conventional wisdom.
The Sonic to Ratchet comparison is not something I can really comment on, I don't really understand it actually. Perhaps in its lifetime Ratchet can't eclipse Sonic's performance, but let us not discount the fact that Ratchet is limited to one platform, while Sonic has often been multiplat recently. I don't know how one gauges the popular demand of Ratchet, because in my mind the appeal is harder to assign a name--broader in age range, a little bit of adolescent and mature humor, stuff like that. I agree that I don't expect Ratchet Monopoly or toys, but I don't know if the people who play Ratchet want monopoly, toys, or a TV show anyway. The audience for Sonic and Ratchet I'm sure have noticeable differences.
As for VGChartz, it's just not a good idea. The alternative in my mind is to scour the net for statements that companies occasionally make.
for what it's worth sometimes one manages to find things like this:
http://www.1up.com/news/npd-fallout-ratchet-sell-fine First-month performance for the entire Ratchet & Clank series, provided by the NPD Group, is as follows:
Ratchet & Clank (November 4, 2002) -- 112,000 units
Ratchet & Clank: Going Commando (November 11, 2003) -- 125,000 units
Ratchet & Clank: Up Your Arsenal (November 3, 2004) -- 207, 500 units
Ratchet: Deadlocked (October 25, 2005) -- 55,300 units
Ratchet & Clank Future: Tools of Destruction (October 30, 2007, though released in most retailers early) -- 74,500 units
The Ratchet & Clank series has never been about breaking sales records as it has been about being a consistent seller. And while Tools of Destruction's inability to break out in October is noteworthy, it ultimately says more about the PS3 as a platform. Simply told, if there were more PS3s, more people would've bought Ratchet. Them's the breaks, Clank.
edit: forgot to add this one:
http://articles.latimes.com/2007/nov/26/business/fi-insomniac26/2Insomniac Games launched in 1998 with a game based on a kid-friendly purple dragon named Spyro. Since then, the studio's games have sold more than 26 million copies. Here are some of its biggest hits, with the number of titles sold:
Spyro the Dragon series
"Spyro the Dragon" (1998): 4,832,145
"Spyro 2: Ripto's Rage" (1999): 3,451,064
"Spryo: Year of the Dragon" (2000): 3,283,077
Ratchet & Clank series
(Sales through June 30, 2007)
"Ratchet & Clank" (2002): 3,714,266
"Ratchet & Clank: Going Commando" (2003): 2,966,758
"Ratchet & Clank: Up Your Arsenal" (2004): 3,218,932
"Ratchet Deadlocked" (2005): 2,169,858
"Ratchet & Clank Future: Tools of Destruction" (Released Oct. 30): No sales data available
"Resistance: Fall of Man"
(Sales through Sept. 30)
2,121,772
Sources: Insomniac Games, Sony Corp.
Formatting courtesy of moi =P