the online royality-free music/sound effect website has now added The Warner Bros. Sound Effects Library and The Sound Effects of Rocky and Bullwinkle and Friends to their sound effects catalog! It's quite a vast selection, and it's not just the usual cartoon blips, boinks, ka-bongs, zings, bonks, zips, plinks, bonks, twangs, klonk, crashes, runs and skids you except from WB and Jay Ward, but it even includes the sounds of gunshots, explosion, science fiction, animals, water, helicopter, trains, planes, boats, fires, bells, wind, thunderclaps, doors, machines and more that have shown up in The Jay Ward, Warner Bros. and Seven Arts' cartoons made prior to 1992.

I already have the full Warner Bros. and Rocky and Bullwinkle Sound Effects Library,

I also have the older "Crash!, Bang!, Boom! The Best of Warner Bros. Sound Effects" CD set released in early 2000s, but it pales in comparisation to the newer Sound Ideas set. It does have several effects available from Hanna-Barbera Sound Effects Library, but it also has maybe a fifth of the effects included on Hanna-Barbera Sound Effects Library! But combining all of them makes for a pretty vast sound library, not just for cartoony stuff, but for general sound purposes as well!
In short, I do have a lot of fun working with these sound effects I grew up listening to on Looney Tunes, Merry Melodies, The Bugs Bunny & Daffy Show and the rest of the Looney Tunes Gang. I've ever heard these sound effects on some currently released shows like "Spongebob Squarepants", "Rugrats", "Lalaloopsy" and of course the games made by Living Books from the early 90s... but I Also listened to Even Close Jay Ward's Sound FX on Stockmusic as well.