Does anyone have favorite colorful pens that don't smudge?

The sharpie pens (ultra fine tip) that I use in my planner bleed through the pages really bad and I'm thinking it's time to try something that's more ball point and less felt tip.

Pilot pens! They're my favorite. 

https://www.jetpens.com/Zebra-Disposable-Brush-Pen-Extra-Fine/pd/2309

I havent tried these personally but I hear they are really good!

https://www.amazon.com/s?k=zebra jet pen&ref=nb_sb_noss_2

(I think here are some colorful ones)

I also love a good Sharpie/felt tip and have had good luck so far with the PaperMate Flair pens - they have some great color options, but the line weight changes over time as the tip wears down. Not sure that that's a real issue, but it bothers me as a perfectionist.

https://www.target.com/p/papermate-flair-18pk-ultra-fine-point-marker-pens/-/A-54012656?ref=tgt_adv_XS000000&AFID=google_pla_df&fndsrc=tgtao&CPNG=PLA_Seasonal Shopping&adgroup=SC_Seasonal&LID=700000001170770pgs&network=g&device=c&location=9017777&gclid=Cj0KCQjwqs3rBRCdARIsADe1pfQVX9GQOZHDmFV2powHKPFJ0cG7SXjp74Z8mFmVAS__iYVSMdIfZWgaAvLIEALw_wcB&gclsrc=aw.ds

Otherwise, I love Micron pens for both sketching and writing. They're known not to bleed and have colorful options and a range of diameters for different line thicknesses, plus a brush tip just for fun. Micron would be my top recommendation but the Flair style is good too!

https://www.dickblick.com/products/sakura-pigma-micron-pen/?clickTracking=true&wmcp=pla&wmcid=items&wmckw=20702-2003&gclid=Cj0KCQjwqs3rBRCdARIsADe1pfS84QSP4x7ZOYEIOJhNNl5TNgd_6I8A1ICe8LC4jPlF4y7eKIITS6IaAnjWEALw_wcB

I was gonna say, most of the studygrams I follow use Mildliner markers and rave about them. For pen pens, I absolutely love my PaperMate InkJoy ballpoints; bright colors and suuuuper smooth writing - seriously the smoothest writing experience I've ever had. As an author, I handwrite my projects and I had to find a pen that was easy to use, low friction, smooth, just generally as easy-going on my hands as possible and these fit the bill :D (the pink does bleed through tho; the other colors don't!)

i have a love for pilot g-2 07 pens 

only pens i use really

Sharpies are alcohol based pens. Anything alcohol based will most likely bleed trough paper if it is not big enough. I suggest anything over 120 gsm ( and put an extra thing under your painting)

Felt tip pens do well on any paper that is 100gsm smooth or more.

Chameleon just brought new fineliners to the market:  https://eushop.chameleonartproducts.com/pages/fineliners I actually enjoyed working with those, they where in the scrawlrbox this month (subscription art supplies box)
in terms of fineliners: Micron or Staedler are very good fineliners. I use  them for my professional art.

However you are asking for ballpoint pens. I really enjoy the Helix Oxford ballpoint pens, They are very smooth and juicy and ALWAYS work. I bought a package of 50 black ones of those, I LOVE them My boyfriend loves them too. They are my #1 to go ballpoint pen as they never fail.

Pilot G2 has some really nice colorfull ballpoint pens too, if you like gel ink they have the pilot juice gel ink ones.

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Yay, thanks for all the suggestions! I'm going to go take a look at them all now!

I switch between 3 different sets of pens. 

Ye Olde Trusty Bic Round Stic pens , my paper mate flair markers, and the Pilot G-2 07 or the fine tip pilot pen. Love a good fine tip! 

https://www.amazon.com/gp/product/B000J07E7I/ref=ox_sc_saved_title_2?smid=ATVPDKIKX0DER&psc=1

these are my favorite pens!