So do you have a legitimate issue with the numbers presented here, or are you just complaining about Sony's inability to compete in the handheld market?

Is your definition of a "skew" using all statistics available? Odd.

From 1996 to 2004 it was basically 2 nintendo systems against 1 Sony console.

Nintendo still won the majority of years after the PSP released: 9 out of 13. They also shipped 61% more hardware than Sony over that period.

Odd?

Nintendo has been making consoles since FY1986. Sony has been FY1996. Let's include those 10 years anyways.
Nintendo has been making handhelds since FY1986. Sony made handhelds between FY2005 and essentially FY2015. Let's include handheld sales anyways.
Nintendo has typically been strongest in the NA Market. Sony has typically been strongest in Europe. Let's focus on the NA anyways.

But no, that's not skewing. Not at all.

How about you compare worldwide home console sales from FY1996 to present?

Do you have data for other regions?

You can make a thread to skew results in favor of Sony if you so desire. Go ahead and make a European FY thread, no one's denying any sort of Sony dominance in that market, in fact someone brought that up already in this very thread.

I said NOT to do that. Do not encourage the fox. 

I'm not interested in skewing results, just in a fair comparison.

Yeah, I've been compiling the data for other regions all day. I'm almost finished with the global chart.

Unfortunately, there are two major problems with doing Japan and Europe:

Nintendo and Sony don't separate their shipment data using the same regions. Instead of "Europe," they have "Other" and "PAL regions" respectively. For Nintendo, this includes everywhere that isn't Japan or the Americas. For Sony, this includes Europe, Oceania, Africa, and South America. On top of that, Sony doesn't actually have a separate shipment tally for Japan, only all of Asia. So it would be Sony's Asia versus Nintendo's Japan.

Secondly, Sony stopped separating their sales by region in 2007, so all region-specific shipments afterward have to be imprecise estimates based on sell-through from VGChartz. This works well enough in the case of North American and Global shipments, but we run into problems everywhere else because of the whole "Other VS PAL" and "Japan VS Asia" issue. Since VGChartz doesn't have those breakdowns anywhere, I don't know what ratios to use in cases like "How much does Europe account for Nintendo's Other shipments?" or "How much does Japan account for Sony's Asian shipments?" I guess I can just compare lifetime shipments to VGChartz lifetime sales, but that gets iffy with consoles that are still selling, since there are still consoles on shelves and the regional ratios could still change.