Those are userscripts
Ultimate timeline gives me the bar chart. [Userscript]: WaniKani Ultimate Timeline
LevelUP celebrater is the graphic, you can change the text and picture if you want. [userscript] Level-Up Celebrator!
And I also turned the burns into a golden yellow using Golden burn. [Userscript]: Golden Burn
I also use the heatmap, that other people have posted pictures of, which can be found here: [Userscript] Wanikani Heatmap